{"id":16513,"date":"2022-05-26T00:12:00","date_gmt":"2022-05-26T07:12:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=16513"},"modified":"2026-02-17T23:28:48","modified_gmt":"2026-02-18T07:28:48","slug":"p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/","title":{"rendered":"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3"},"content":{"rendered":"<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col,.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col{flex-direction:column;}.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column16513_bb2f40-a0{position:relative;}@media all and (max-width: 1024px){.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column16513_bb2f40-a0 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column16513_bb2f40-a0 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f6a212  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-28819b\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading16513_ae3f1a-e1, .wp-block-kadence-advancedheading.kt-adv-heading16513_ae3f1a-e1[data-kb-block=\"kb-adv-heading16513_ae3f1a-e1\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading16513_ae3f1a-e1 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading16513_ae3f1a-e1[data-kb-block=\"kb-adv-heading16513_ae3f1a-e1\"] mark.kt-highlight{font-family:Inter;font-weight:500;font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading16513_ae3f1a-e1 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading16513_ae3f1a-e1[data-kb-block=\"kb-adv-heading16513_ae3f1a-e1\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading16513_ae3f1a-e1 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading16513_ae3f1a-e1\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DTC P0042 stands for &ldquo;HO2S Heater Control Circuit Bank 1 Sensor 3&rdquo;<\/li>\n\n\n\n<li>This code is logged when the PCM detects a problem with the heater circuit of the third sensor downstream from the engine on bank 1.<\/li>\n\n\n\n<li>Code P0042 is commonly caused by a faulty oxygen sensor or problems with the oxygen sensor heater control circuit.<\/li>\n\n\n\n<li>Other DTCs may be logged together with this code. It is similar to codes P0043 and P0044.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>If you&rsquo;re having trouble figuring out what code P0042 means and how to resolve it, you&rsquo;ve come to the right place. Read on to learn more about P0042, its triggers, and common symptoms you should look out for.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0042 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0042 stands for &ldquo;HO2S Heater Control Circuit Bank 1 Sensor 3.&rdquo; It is logged when the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module\">powertrain control module<\/a>(PCM) detects a possible issue with the heater circuit for the third sensor downstream from the engine on bank 1.<\/p>\n\n\n\n<p>When there are only 3 O2 sensors it&rsquo;s typically because there&rsquo;s only one catalyst being monitored, and &ldquo;Bank 1&rdquo; is the default designation when there&rsquo;s only one sensor in a category.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"928\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/05\/oxygen-sensor-diagram-928x1024.jpg\" alt=\"oxygen sensor diagram\" class=\"wp-image-69468\" style=\"width:928px;height:1024px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/05\/oxygen-sensor-diagram-928x1024.jpg 928w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/05\/oxygen-sensor-diagram-272x300.jpg 272w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/05\/oxygen-sensor-diagram-768x848.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/05\/oxygen-sensor-diagram-150x166.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/05\/oxygen-sensor-diagram.jpg 1359w\" sizes=\"(max-width: 928px) 100vw, 928px\"><figcaption class=\"wp-element-caption\">Diagram showing 3 oxygen sensors | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<p>Bank 1 is the side of the engine where the #1 cylinder is located. P0042 code is set when your car&rsquo;s PCM determines a potential problem with the heater element circuit of the oxygen sensor.<\/p>\n\n\n\n<p>Newer car models determine oxygen content through heated oxygen sensors in the exhaust system before and after the <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>(s). The information supplied by the oxygen sensors helps the fuel system maintain the right air to fuel ratio. Downstream oxygen sensors also help the PCM determine the efficiency of the catalytic converter.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"820\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-in-exhaust-1024x820.jpeg\" alt=\"oxygen sensor lambda sensor in exhaust\" class=\"wp-image-16515\" style=\"width:1024px;height:820px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-in-exhaust-1024x820.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-in-exhaust-300x240.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-in-exhaust-768x615.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-in-exhaust-150x120.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-in-exhaust.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\"> The information supplied by the oxygen sensors helps the fuel system maintain the right air to fuel ratio.  <\/figcaption><\/figure>\n\n\n\n<p>The oxygen sensor is designed to measure the amount of oxygen present in the exhaust gasses exiting the engine. Remember, the O2 sensor doesn&rsquo;t detect fuel, so a misfiring cylinder may initially show up as a lean condition due to the oxygen exiting the cylinder with the unburned fuel<\/p>\n\n\n\n<p>For the information relayed by the oxygen sensor to be accurate, it has to be kept at a certain temperature. That&rsquo;s where the oxygen sensor&rsquo;s heater element comes in. When the PCM detects an issue with the heater wire inside the sensor, specifically in bank 1 sensor 3, code P0042 is set.<\/p>\n\n\n\n<p><em><strong>Note<\/strong>: The definition of code P0042 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Possible Causes of the P0042 Code?<\/h2>\n\n\n\n<p>P0042 is a generic code, so it can have several triggers. Here are the most common:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/bad-o2-sensor-symptoms-causes-replacement-cost\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty oxygen sensor\">Faulty oxygen sensor<\/a><\/li>\n\n\n\n<li>An issue with the oxygen sensor heater control circuit<\/li>\n\n\n\n<li>Faulty PCM<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"428\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-1024x428.jpeg\" alt=\"mechanic repairing vehicle engine\" class=\"wp-image-16516\" style=\"width:1024px;height:428px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-1024x428.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-300x126.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-768x321.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-1536x643.jpeg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-scaled.jpeg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/mechanic-repairing-vehicle-engine-150x63.jpeg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\"> To ensure your engine remains in top condition, code P0042 should be resolved immediately.  <\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0042 Code?<\/h2>\n\n\n\n<p>Depending on the severity, other related DTCs may also be stored. Code P0042 is very similar to error codes P0043 and P0044. Generally, you may notice this symptom if you drive a vehicle with a set P0042 trouble code:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Check engine light is illuminated\">Check engine light is illuminated<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0042 Code<\/h2>\n\n\n\n<p>To ensure your engine remains in top condition, code P0042 should be resolved immediately. However, diagnosing this code can be tricky as it may have many potential causes. The diagnostic and repair steps should depend on the specifications of your vehicle. For instance, a P0042 on a <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\/chevrolet\/silverado\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Silverado\">Silverado<\/a> may require a different diagnosis from a P0042 on a <a href=\"https:\/\/www.carparts.com\/blog\/subaru-forester-reliability-and-common-problems\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Forester\">Forester<\/a>.<\/p>\n\n\n\n<p>Check out the video below to get an idea of what the diagnostic process might involve:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/www.youtube.com\/watch?v=fBQ-1pqSoXM&amp;t=65s\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0042 Code<\/h2>\n\n\n\n<p>Like other <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II codes\">OBD-II codes<\/a>, there is no fixed solution for a P0042 code. Although the P0042 engine code shares similar triggers and symptoms with various other trouble codes, it doesn&rsquo;t have a universal solution.<\/p>\n\n\n\n<p>Repair and diagnostic steps still depend on the specifications of your vehicle, so consult a vehicle-specific repair manual before proceeding.<\/p>\n\n\n\n<p>If you&rsquo;re not well-versed in auto repair, it may be best to leave the job to a mechanic. Otherwise, you can do the repairs yourself. There are <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"online auto repair sources\">online auto repair sources<\/a>you can use as a guide to help you identify which repair steps apply to your vehicle.<\/p>\n\n\n\n<p>It may also be a good idea to subscribe to ALLDATA for detailed factory repair information. It can help you fix error code P0042 and serve as a reference for future trouble codes you may encounter.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New Heater Control Circuit for Your Vehicle<\/h2>\n\n\n\n<p>You might not notice issues with your vehicle immediately when the oxygen sensor has a bad heater control circuit. This issue will only trigger your check engine light, but that alone should already be a cause for concern. Once you&rsquo;ve identified that you need to replace your <a href=\"http:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensor\">oxygen sensor<\/a>, don&rsquo;t wait too long before getting a replacement for your vehicle.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a> makes shopping for repairs quick and easy. Order the parts you need in just a few clicks. Simply enter your vehicle&rsquo;s year, make, and model into our vehicle selector to find compatible heater control circuits for your ride. You can also use the search filters to refine the catalog according to your preferred brand, price range, quantity, and more.<\/p>\n\n\n\n<p>All our products come with a low-price and lifetime replacement guarantee, helping you get the best value for your money. Get your order delivered straight to your doorstep in as fast as two business days.<\/p>\n\n\n\n<p>Shop now, and take advantage of our awesome deals!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Products Mentioned in this Guide<\/h2>\n\n\n\n<div class=\"reusable-productlink\">\n\n<!-- start of editable content -->\n\n<a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" aria-label=\"Oxygen Sensor\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/repg960907_1\" alt=\"Oxygen Sensor\">\n<strong>Oxygen Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" aria-label=\"Catalytic Converter\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/repi960303_1\" alt=\"Catalytic Converter\">\n<strong>Catalytic Converter<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" aria-label=\"Engine Control Module\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/a1721000_1\" alt=\"Engine Control Module\">\n<strong>Engine Control Module<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n<\/div>\n\n\n\n<div class=\"shop-project\">\n\n    <h2>Shop this Project<\/h2>\n\n    <ul class=\"shop-project-list\">\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/oxygen-sensor\/drivewire\/repn960915\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960915_1\" alt=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960915_1\" alt=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/oxygen-sensor\/drivewire\/repn960915\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated\">DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$49.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/oxygen-sensor\/drivewire\/repn960915\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/catalytic-converter\/evan-fischer\/repn960344\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960344_1\" alt=\"Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repn960344_1\" alt=\"Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/catalytic-converter\/evan-fischer\/repn960344\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine\">Evan Fischer&reg; &ndash; Rear Catalytic Converter, Federal EPA Standard, 46-State Legal, 2.5L Engine<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$154.99<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/catalytic-converter\/evan-fischer\/repn960344\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n        \n        <li>\n            <div class=\"shop-project-item\">\n                <div class=\"stp-image-url\">\n                    <a href=\"https:\/\/www.carparts.com\/details\/engine-control-module\/a1-cardone\/a1777747\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/a1777747_5\" alt=\"A1 Cardone&reg; &ndash; 77-7747 Reman Series Engine Control Module &ndash; Direct Fit, Sold individually\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/a1777747_5\" alt=\"A1 Cardone&reg; &ndash; 77-7747 Reman Series Engine Control Module &ndash; Direct Fit, Sold individually\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/engine-control-module\/a1-cardone\/a1777747\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"A1 Cardone&reg; &ndash; 77-7747 Reman Series Engine Control Module &ndash; Direct Fit, Sold individually\">A1 Cardone&reg; &ndash; 77-7747 Reman Series Engine Control Module &ndash; Direct Fit, Sold individually<\/a>\n                        <\/p>\n                    \n                    <div class=\"stp-stars\">\n                        <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/q_auto,dpr_auto,f_auto\/carparts\/blog\/widgets\/shop-project\/stars\/star-4.5.svg\" alt=\"4.5 Stars\">\n                    <\/div>\n\n                                            <p class=\"stp-price\">$95.49<\/p>\n                    \n                    <p><small>Price and rating may change from the time content is published.<\/small><\/p>\n\n                                            <p class=\"stp-cta\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/engine-control-module\/a1-cardone\/a1777747\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Shop Now\">Shop Now<\/a>\n                        <\/p>\n                                    <\/div>\n\n            <\/div>\n        <\/li>\n\n            <\/ul>\n<\/div>\n\n\n<\/body><\/html>\n","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading Time: <\/span> <span class=\"rt-time\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>If you&rsquo;re having trouble figuring out what code P0042 means and how to resolve it, you&rsquo;ve come to the right&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":16514,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[1314],"tags":[161,504,159,1926,1925,1239,162,1709,1710],"ppma_author":[2607,2985],"class_list":{"0":"post-16513","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-catalytic-converter","9":"tag-engine-control-module","10":"tag-exhaust-manifold","11":"tag-exhaust-manifold-clamp","12":"tag-exhaust-manifold-gasket","13":"tag-exhaust-manifold-gasket-set","14":"tag-oxygen-sensor","15":"tag-oxygen-sensor-harness","16":"tag-oxygen-sensor-socket","17":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3 - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what code P0042 means, its triggers, usual symptoms, and the common solutions you may try to resolve this trouble code.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3 - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what code P0042 means, its triggers, usual symptoms, and the common solutions you may try to resolve this trouble code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/\" \/>\n<meta property=\"og:site_name\" content=\"In The Garage with CarParts.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/carpartscom\" \/>\n<meta property=\"article:published_time\" content=\"2022-05-26T07:12:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-18T07:28:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"CarParts.com Research Team, Richard McCuistian, ASE Certified Master Automobile Technician\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/CarPartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"CarParts.com Research Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"1651\",\"name\":\"CarParts.com Research Team\",\"jobTitle\":\"Expert Automotive Writer\",\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\",\"sameAs\":\"https:\\\/\\\/www.facebook.com\\\/carpartscom, https:\\\/\\\/twitter.com\\\/CarPartscom, https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/, https:\\\/\\\/www.instagram.com\\\/carpartscom\\\/\"},{\"@type\":\"Person\",\"$id\":\"1651\",\"name\":\"Richard McCuistian\",\"jobTitle\":\"ASE Master Automobile Technician\",\"description\":\"Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.\",\"knowsAbout\":\"Auto Repair, Car Maintenance, Auto Parts, Car Reviews\",\"publishingPrinciples\":\"\\\/blog\\\/our-team\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/richardmccuistian\\\/\",\"sameAs\":\"https:\\\/\\\/www.linkedin.com\\\/in\\\/richard-mccuistian-2681891b\\\/, https:\\\/\\\/www.youtube.com\\\/user\\\/McCuistian\"}],\"headline\":\"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3\",\"datePublished\":\"2022-05-26T07:12:00+00:00\",\"dateModified\":\"2026-02-18T07:28:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/\"},\"wordCount\":977,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/09\\\/oxygen-sensor-lambda-sensor-white-background.jpeg\",\"keywords\":[\"catalytic converter\",\"Engine Control Module\",\"exhaust manifold\",\"exhaust-manifold-clamp\",\"exhaust-manifold-gasket\",\"exhaust-manifold-gasket-set\",\"oxygen sensor\",\"oxygen-sensor-harness\",\"oxygen-sensor-socket\"],\"articleSection\":[\"OBD-II Trouble Codes\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/\",\"name\":\"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3 - In The Garage with CarParts.com\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/09\\\/oxygen-sensor-lambda-sensor-white-background.jpeg\",\"datePublished\":\"2022-05-26T07:12:00+00:00\",\"dateModified\":\"2026-02-18T07:28:48+00:00\",\"description\":\"Find out what code P0042 means, its triggers, usual symptoms, and the common solutions you may try to resolve this trouble code.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/09\\\/oxygen-sensor-lambda-sensor-white-background.jpeg\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/09\\\/oxygen-sensor-lambda-sensor-white-background.jpeg\",\"width\":1500,\"height\":1000,\"caption\":\"oxygen sensor lambda sensor white background\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/\",\"name\":\"In The Garage with CarParts.com\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#organization\",\"name\":\"CarParts.com\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/cp-itg-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/03\\\/cp-itg-logo.png\",\"width\":2048,\"height\":398,\"caption\":\"CarParts.com\"},\"image\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/carpartscom\",\"https:\\\/\\\/x.com\\\/carpartscom\",\"https:\\\/\\\/www.instagram.com\\\/carpartscom\",\"https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/#\\\/schema\\\/person\\\/9f8a8b00e1b9f62f86295617b525e1f0\",\"name\":\"CarParts.com Research Team\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/thecpteam.jpg485c93be26f8b27acc17cbe4a2313397\",\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/thecpteam.jpg\",\"contentUrl\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/wp-content\\\/uploads\\\/2024\\\/04\\\/thecpteam.jpg\",\"caption\":\"CarParts.com Research Team\"},\"description\":\"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.\",\"sameAs\":[\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\",\"https:\\\/\\\/www.facebook.com\\\/carpartscom\",\"https:\\\/\\\/www.instagram.com\\\/carpartscom\\\/\",\"https:\\\/\\\/x.com\\\/https:\\\/\\\/twitter.com\\\/CarPartscom\",\"https:\\\/\\\/www.youtube.com\\\/@CarPartscomOfficial\\\/\"],\"url\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/author\\\/thecpteam\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3 - In The Garage with CarParts.com","description":"Find out what code P0042 means, its triggers, usual symptoms, and the common solutions you may try to resolve this trouble code.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/","og_locale":"en_US","og_type":"article","og_title":"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3 - In The Garage with CarParts.com","og_description":"Find out what code P0042 means, its triggers, usual symptoms, and the common solutions you may try to resolve this trouble code.","og_url":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/","og_site_name":"In The Garage with CarParts.com","article_publisher":"https:\/\/www.facebook.com\/carpartscom","article_author":"https:\/\/www.facebook.com\/carpartscom","article_published_time":"2022-05-26T07:12:00+00:00","article_modified_time":"2026-02-18T07:28:48+00:00","og_image":[{"width":1500,"height":1000,"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","type":"image\/jpeg"}],"author":"CarParts.com Research Team, Richard McCuistian, ASE Certified Master Automobile Technician","twitter_card":"summary_large_image","twitter_creator":"@https:\/\/twitter.com\/CarPartscom","twitter_site":"@carpartscom","twitter_misc":{"Written by":"CarParts.com Research Team","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/#article","isPartOf":{"@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/"},"author":[{"@type":"Person","$id":"1651","name":"CarParts.com Research Team","jobTitle":"Expert Automotive Writer","description":"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com&#039;s thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.","knowsAbout":"Auto Repair, Car Maintenance, Auto Parts, Car Reviews","publishingPrinciples":"\/blog\/our-team\/","url":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/","sameAs":"https:\/\/www.facebook.com\/carpartscom, https:\/\/twitter.com\/CarPartscom, https:\/\/www.youtube.com\/@CarPartscomOfficial\/, https:\/\/www.instagram.com\/carpartscom\/"},{"@type":"Person","$id":"1651","name":"Richard McCuistian","jobTitle":"ASE Master Automobile Technician","description":"Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.","knowsAbout":"Auto Repair, Car Maintenance, Auto Parts, Car Reviews","publishingPrinciples":"\/blog\/our-team\/","url":"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/","sameAs":"https:\/\/www.linkedin.com\/in\/richard-mccuistian-2681891b\/, https:\/\/www.youtube.com\/user\/McCuistian"}],"headline":"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3","datePublished":"2022-05-26T07:12:00+00:00","dateModified":"2026-02-18T07:28:48+00:00","mainEntityOfPage":{"@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/"},"wordCount":977,"commentCount":0,"publisher":{"@id":"https:\/\/www.carparts.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/#primaryimage"},"thumbnailUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","keywords":["catalytic converter","Engine Control Module","exhaust manifold","exhaust-manifold-clamp","exhaust-manifold-gasket","exhaust-manifold-gasket-set","oxygen sensor","oxygen-sensor-harness","oxygen-sensor-socket"],"articleSection":["OBD-II Trouble Codes"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/","url":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/","name":"P0042 Code: HO2S Heater Control Circuit Bank 1 Sensor 3 - In The Garage with CarParts.com","isPartOf":{"@id":"https:\/\/www.carparts.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/#primaryimage"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/#primaryimage"},"thumbnailUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","datePublished":"2022-05-26T07:12:00+00:00","dateModified":"2026-02-18T07:28:48+00:00","description":"Find out what code P0042 means, its triggers, usual symptoms, and the common solutions you may try to resolve this trouble code.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/p0042-code-ho2s-heater-control-circuit-bank-1-sensor-3\/#primaryimage","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","width":1500,"height":1000,"caption":"oxygen sensor lambda sensor white background"},{"@type":"WebSite","@id":"https:\/\/www.carparts.com\/blog\/#website","url":"https:\/\/www.carparts.com\/blog\/","name":"In The Garage with CarParts.com","description":"","publisher":{"@id":"https:\/\/www.carparts.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.carparts.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.carparts.com\/blog\/#organization","name":"CarParts.com","url":"https:\/\/www.carparts.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/03\/cp-itg-logo.png","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2025\/03\/cp-itg-logo.png","width":2048,"height":398,"caption":"CarParts.com"},"image":{"@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/carpartscom","https:\/\/x.com\/carpartscom","https:\/\/www.instagram.com\/carpartscom","https:\/\/www.youtube.com\/@CarPartscomOfficial\/"]},{"@type":"Person","@id":"https:\/\/www.carparts.com\/blog\/#\/schema\/person\/9f8a8b00e1b9f62f86295617b525e1f0","name":"CarParts.com Research Team","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg485c93be26f8b27acc17cbe4a2313397","url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","contentUrl":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","caption":"CarParts.com Research Team"},"description":"The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.","sameAs":["https:\/\/www.carparts.com\/blog\/author\/thecpteam\/","https:\/\/www.facebook.com\/carpartscom","https:\/\/www.instagram.com\/carpartscom\/","https:\/\/x.com\/https:\/\/twitter.com\/CarPartscom","https:\/\/www.youtube.com\/@CarPartscomOfficial\/"],"url":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/"}]}},"featured_image_src":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","featured_image_src_square":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-lambda-sensor-white-background.jpeg","author_info":{"display_name":"CarParts.com Research Team","author_link":"https:\/\/www.carparts.com\/blog\/author\/thecpteam\/"},"authors":[{"term_id":2607,"user_id":1651,"is_guest":0,"slug":"thecpteam","display_name":"CarParts.com Research Team","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2024\/04\/thecpteam.jpg"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":2985,"user_id":1646,"is_guest":0,"slug":"richardmccuistian","display_name":"Richard McCuistian, ASE Certified Master Automobile Technician","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/16513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/users\/1651"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=16513"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/16513\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/16514"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=16513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=16513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=16513"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=16513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}