{"id":18685,"date":"2022-08-05T00:31:00","date_gmt":"2022-08-05T07:31:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=18685"},"modified":"2026-02-10T19:15:31","modified_gmt":"2026-02-11T03:15:31","slug":"p0143-code-o2-sensor-circuit-low-voltage-bank-1-sensor-3","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0143-code-o2-sensor-circuit-low-voltage-bank-1-sensor-3\/","title":{"rendered":"P0143 Code: O2 Sensor Circuit Low Voltage (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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column18685_f29e26-e1 > .kt-inside-inner-col,.kadence-column18685_f29e26-e1 > .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-column18685_f29e26-e1 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column18685_f29e26-e1 > .kt-inside-inner-col{flex-direction:column;}.kadence-column18685_f29e26-e1 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column18685_f29e26-e1 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column18685_f29e26-e1{position:relative;}@media all and (max-width: 1024px){.kadence-column18685_f29e26-e1 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column18685_f29e26-e1 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column18685_f29e26-e1 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-e29097  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-3d272e\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading18685_e61bba-d3, .wp-block-kadence-advancedheading.kt-adv-heading18685_e61bba-d3[data-kb-block=\"kb-adv-heading18685_e61bba-d3\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading18685_e61bba-d3 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading18685_e61bba-d3[data-kb-block=\"kb-adv-heading18685_e61bba-d3\"] 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-heading18685_e61bba-d3 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading18685_e61bba-d3[data-kb-block=\"kb-adv-heading18685_e61bba-d3\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading18685_e61bba-d3 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading18685_e61bba-d3\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The diagnostic trouble code (DTC) P0143 stands for &ldquo;O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3).&rdquo;<\/li>\n\n\n\n<li>The powertrain control module (PCM) will log the P0143 code if it detects a lower-than-normal signal voltage from the bank 1, sensor 3 post-catalytic converter oxygen sensor or its circuit.<\/li>\n\n\n\n<li>Common causes of the P0143 code are air leaks in the exhaust, a bad oxygen sensor, and wiring issues.<\/li>\n\n\n\n<li>The P0143 code&rsquo;s symptoms are an illuminated check engine light and poor engine performance.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The P0143 code is one of many <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"trouble codes\">trouble codes<\/a> that may be logged by your vehicle&rsquo;s primary computer. Read on to learn about what it involves, its potential triggers, and common symptoms.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0143 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0143 stands for &ldquo;O2 Sensor Circuit Low Voltage Bank 1 Sensor 3.&rdquo; It is logged when the powertrain control module (PCM) detects a potential problem with the bank 1, sensor 3 post-catalytic converter (catcon) oxygen sensor or its circuit.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code-1024x683.jpeg\" alt=\"P0143 trouble code\" class=\"wp-image-18690\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/P0143-trouble-code.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Code P0143 may register if the PCM detects a potential problem with the bank 1, sensor 3 post-catcon oxygen sensor or its circuit.<\/figcaption><\/figure>\n\n\n\n<p>Depending on the vehicle configuration, &ldquo;bank 1&rdquo; may refer to the side of the engine that contains cylinder 1. &ldquo;Sensor 3&rdquo; refers to one of the oxygen sensors located downstream of the catalytic converter.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensor\">oxygen sensor<\/a> located at the rear of the <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a> (bank 1, sensor 3) measures the catcon&rsquo;s efficiency in controlling emissions. The PCM uses this information to determine if the converter is in working condition.<\/p>\n\n\n\n<p>A functional post-cat sensor will exhibit voltage differences at a slower rate than the front oxygen sensors. It typically indicates a low switching frequency between the two sensors. However, if the PCM perceives the signal voltage from the post-cat oxygen sensor to be lower than factory specifications, it will set error code P0143.<\/p>\n\n\n\n<p>There&rsquo;s more information that can help you fix P0143 in our advanced discussion about the <a href=\"https:\/\/www.carparts.com\/blog\/p0138-code-o2-sensor-circuit-high-voltage-bank-1-sensor-2\/#How_the_Downstream_Oxygen_Sensor_Can_Trigger_P0138\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"downstream oxygen sensor\">downstream oxygen sensor<\/a>.<\/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<p><em><strong>Note: <\/strong>The definition of code P0143 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 P0143 Code?<\/h2>\n\n\n\n<p>P0143 is a generic code, so it can have many triggers. Here are the most common:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Air leaks in the exhaust resulting in false readings<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/bad-o2-sensor-symptoms-causes-replacement-cost\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Failed oxygen sensor\">Failed oxygen sensor<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Wiring issues\">Wiring issues<\/a><\/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=\"576\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/p0143-cause-1024x576.jpeg\" alt=\"mechanic checking vehicle chassis\" class=\"wp-image-18691\" style=\"width:1024px;height:576px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/p0143-cause-1024x576.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/p0143-cause-300x169.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/p0143-cause-768x432.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/p0143-cause-150x84.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/p0143-cause.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Air leaks in the exhaust that result in false readings are a possible cause of code P0143.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0143 Code?<\/h2>\n\n\n\n<p>You may notice the following symptoms if you drive a car that has a logged P0143 engine code:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Check engine light is on\">Check engine light is on<\/a><\/li>\n\n\n\n<li>Poor engine performance<\/li>\n\n\n\n<li>In some cases, there may be no other abnormal symptoms<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0143 Code<\/h2>\n\n\n\n<p>Although the P0143 engine code may have similar triggers and symptoms to other DTCs, there is no universal fix for this code. Vehicles are built differently depending on the manufacturer, so the code&rsquo;s exact diagnostic and repair procedures may vary.<\/p>\n\n\n\n<p>If you&rsquo;re not an advanced DIYer, don&rsquo;t attempt to diagnose the code on your own. It might be best to leave the diagnosis to a professional.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0143 Code<\/h2>\n\n\n\n<p>Code P0143 may be set in vehicles of varying makes and models. It may also share similar causes and symptoms with other DTCs. However, since vehicle designs differ per manufacturer, there is no single, fail-safe solution for this code.<\/p>\n\n\n\n<p>Always refer to the <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"factory repair information\">factory repair information<\/a> specific to your car before <a href=\"https:\/\/www.carparts.com\/blog\/15-easiest-diy-repairs\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DIY-ing any repairs\">DIY-ing any repairs<\/a>. For instance, a solution that worked for a P0143 on a <a href=\"https:\/\/www.carparts.com\/chevrolet\/suburban\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chevy Suburban\">Chevy Suburban<\/a> might not work for a P0143 on a <a href=\"https:\/\/www.carparts.com\/blog\/toyota-sequoia-reliability-and-common-problems\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Toyota Sequoia\">Toyota Sequoia<\/a>. <\/p>\n\n\n\n<p>If you aren&rsquo;t confident in your automotive know-how, it may be best to bring your vehicle to an auto shop for proper diagnosis and repair.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Replace Your Faulty Oxygen Sensor Today<\/h2>\n\n\n\n<p>Diagnostic trouble codes like P0143 are not meant to be ignored. Unless you want the problem to get worse, you should address the issue head-on by replacing the faulty oxygen sensor causing it. Luckily, getting a replacement oxygen sensor is fast and easy with CarParts.com.&nbsp;<\/p>\n\n\n\n<p>CarParts.com offers a wide selection of high-quality oxygen sensors that you can easily browse with the help of our built-in vehicle selector and search filters. We want to take the guesswork out of shopping for auto parts, so we provide accurate and detailed fitment information for each product. In case you aren&rsquo;t completely satisfied with your order, you can also avail of our 60-day return policy. We&rsquo;ll give you your money back as long as you return your order within 60 days of your purchase.<\/p>\n\n\n\n<p>Don&rsquo;t wait until your faulty oxygen sensor starts affecting your engine&rsquo;s performance before replacing it. Check out our wide selection of <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensors\">oxygen sensors<\/a> at CarParts.com and get a replacement today!<\/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\/repb960901\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repb960901_1\" alt=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated, With Female Connector\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/repb960901_1\" alt=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated, With Female Connector\"><\/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\/repb960901\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated, With Female Connector\">DriveWire &ndash; Oxygen Sensor, 4-Wire, Heated, With Female Connector<\/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\">$22.99<\/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\/repb960901\" 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\/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\/engine-control-module\/a1-cardone\/a1777747\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/a1777747_1\" 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_1\" 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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>The P0143 code is one of many trouble codes that may be logged by your vehicle&rsquo;s primary computer. Read on&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0143-code-o2-sensor-circuit-low-voltage-bank-1-sensor-3\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":18689,"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":[1190],"ppma_author":[2607,2985],"class_list":{"0":"post-18685","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-oxygen-sensor-2","9":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0143 Code: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out why your vehicle has a logged P0143 error code and what it means with the help of this quick but informative guide.\" \/>\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\/p0143-code-o2-sensor-circuit-low-voltage-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=\"P0143 Code: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out why your vehicle has a logged P0143 error code and what it means with the help of this quick but informative guide.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0143-code-o2-sensor-circuit-low-voltage-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=\"2022-08-05T07:31:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-11T03:15:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/10\/code-p0143.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=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage-bank-1-sensor-3\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0143-code-o2-sensor-circuit-low-voltage-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. 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