{"id":11279,"date":"2021-10-29T01:18:00","date_gmt":"2021-10-29T08:18:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=11279"},"modified":"2026-02-10T18:17:23","modified_gmt":"2026-02-11T02:17:23","slug":"p0155-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-1","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0155-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-1\/","title":{"rendered":"P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)"},"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-column11279_a9c1b4-3e > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column11279_a9c1b4-3e > .kt-inside-inner-col,.kadence-column11279_a9c1b4-3e > .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-column11279_a9c1b4-3e > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column11279_a9c1b4-3e > .kt-inside-inner-col{flex-direction:column;}.kadence-column11279_a9c1b4-3e > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column11279_a9c1b4-3e > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column11279_a9c1b4-3e{position:relative;}@media all and (max-width: 1024px){.kadence-column11279_a9c1b4-3e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column11279_a9c1b4-3e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column11279_a9c1b4-3e inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-44fae1  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-6b5698\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading11279_ef3098-88, .wp-block-kadence-advancedheading.kt-adv-heading11279_ef3098-88[data-kb-block=\"kb-adv-heading11279_ef3098-88\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading11279_ef3098-88 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading11279_ef3098-88[data-kb-block=\"kb-adv-heading11279_ef3098-88\"] 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-heading11279_ef3098-88 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading11279_ef3098-88[data-kb-block=\"kb-adv-heading11279_ef3098-88\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading11279_ef3098-88 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading11279_ef3098-88\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DTC P0155 stands for &rdquo;O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1).&rdquo; It&rsquo;s logged when the PCM receives an unexpected voltage condition or excessive current drawn on the heater circuit of the O2 sensor in bank 2.<\/li>\n\n\n\n<li>Some issues that could trigger the code include an open HO2S heater power (12v) circuit, a damaged HO2S connector, and a defective HO2S heater.<\/li>\n\n\n\n<li>A lit check engine light and reduced fuel economy are some of the symptoms of this trouble code.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>What is a P0155 code? Read on to learn about its possible causes, common symptoms, and everything else it entails.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0155 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P0155 stands for &rdquo;O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1).&rdquo; It is triggered when the vehicle&rsquo;s computer or the engine control module (ECM) detects <strong>an unexpected voltage condition or excessive current draw on the heater circuit<\/strong> of your vehicle&rsquo;s Bank 2 HO2.<\/p>\n\n\n\n<p>To ensure that the oxygen sensors operate at the right time, the PCM tests the heater circuits regularly. If it detects an issue in the heater circuit for the engine bank 2&rsquo;s oxygen sensor, it activates the <a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Check Engine Light\">Check Engine Light<\/a> and sets the P0155 code.<\/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\/07\/car-battery-with-low-voltage-1024x683.jpeg\" alt=\"Car battery with low voltage\" class=\"wp-image-11282\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/car-battery-with-low-voltage-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/car-battery-with-low-voltage-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/car-battery-with-low-voltage-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/car-battery-with-low-voltage-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/07\/car-battery-with-low-voltage.jpeg 1521w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Low-voltage battery is a possible cause of  the P0155 code. <\/figcaption><\/figure>\n\n\n\n<p>Code P0155 is part of a family of codes, listed as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.carparts.com\/blog\/p0141-code-oxygen-sensor-heater-circuit-malfunction-bank-1-sensor-2\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0141\">P0141<\/a> <\/strong>&ndash; Sensor Heater Circuit Bank 1 Sensor 2<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.carparts.com\/blog\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0161\">P0161<\/a><\/strong> &ndash; Sensor Heater Circuit Bank 2 Sensor 2<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.carparts.com\/blog\/p0135-code-heated-o2-sensor-heater-circuit-malfunction-bank-1-sensor-1\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0135\">P0135<\/a><\/strong> &ndash; O2 Sensor Heater Circuit Bank 1 Sensor 1<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.carparts.com\/blog\/p0155-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-1\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P0155\">P0155<\/a><\/strong> &ndash; O2 Heater Circuit Bank 2, Sensor 1<\/li>\n<\/ul>\n\n\n\n<p>For more information on the heating process of oxygen sensors, you can read our technical explanation <a href=\"https:\/\/www.carparts.com\/blog\/p0141-code-oxygen-sensor-heater-circuit-malfunction-bank-1-sensor-2\/#Why_Do_Oxygen_Sensors_Need_Heat\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"here\">here<\/a>. Need help locating Bank 2, Sensor 1? Read our guide <a href=\"https:\/\/www.carparts.com\/blog\/p0141-code-oxygen-sensor-heater-circuit-malfunction-bank-1-sensor-2\/#Bank_1_vs_Bank_2\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"here\">here<\/a>.<\/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\/2021\/10\/automotive-egr-system-1024x683.jpg\" alt=\"automotive egr system\" class=\"wp-image-45227\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/10\/automotive-egr-system-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/10\/automotive-egr-system-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/10\/automotive-egr-system-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/10\/automotive-egr-system-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/10\/automotive-egr-system-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/10\/automotive-egr-system.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">A disconnected hose to the EGR system module can trigger code P0155<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Possible Causes of the P0155 Code?<\/h2>\n\n\n\n<p>The engine code P0155 has several possible causes, which can differ depending on the vehicle&rsquo;s make and model. Below are just some of the reasons why this error code may appear:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>HO2S heater power (12v) circuit is open<\/li>\n\n\n\n<li>HO2S heater ground circuit is open<\/li>\n\n\n\n<li>HO2S heater control circuit is open, shorted to voltage, or shorted to the ground<\/li>\n\n\n\n<li>Damaged HO2S connector<\/li>\n\n\n\n<li>Defective HO2S heater (most common cause)<\/li>\n\n\n\n<li>Low battery voltage condition<\/li>\n\n\n\n<li>Disconnected hose to the exhaust gas recirculation (EGR) system module<\/li>\n\n\n\n<li>Faulty PCM<\/li>\n<\/ul>\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\">What are the Common Symptoms of the P0155 Code?<\/h2>\n\n\n\n<p>With a code P0155, there&rsquo;s a possibility that you won&rsquo;t perceive any noticeable differences in operation. The only symptoms you are likely to experience when a P0155 code pops up are the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check engine light is on<\/li>\n\n\n\n<li>Decreased fuel economy<\/li>\n<\/ul>\n\n\n\n<p>It&rsquo;s also possible for you to <a href=\"https:\/\/www.carparts.com\/blog\/how-to-pass-an-emissions-test\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fail an emissions test\">fail an emissions test<\/a> if this code is set.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0155 Code<\/h2>\n\n\n\n<p>It&rsquo;s best to just replace the O2 sensor in question, but make sure you&rsquo;re replacing the right one. You can also disconnect the sensor and measure the resistance of the heater (the heater wires are the ones that are the same color on the sensor). The normal reading for a good heater is about 6 ohms, plus or minus an ohm.<\/p>\n\n\n\n<p>You can also take an old O2 sensor connector with the sensor removed and wire a tail light bulb to the two wires that are the same color, then plug this into the harness and start the engine. The light should come on. If it doesn&rsquo;t, check the fuses and see what you find. The ground comes from the ECM\/PCM and the power is typically fed to the heater through a relay, which will be a fused circuit.<\/p>\n\n\n\n<p>If you want to determine what triggered the code, watch the video reference below. It will help you understand what the troubleshooting process entails.&nbsp;<\/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\">\n<iframe loading=\"lazy\" title=\"P0155 P0135 Diagnosing O2 Sensor Heater circuit, heated oxygen sensor\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/tRRN-70zMLc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0155 Code<\/h2>\n\n\n\n<p>Despite many trouble codes sharing causes and symptoms, there is no single solution for <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"OBD-II DTCs\">OBD-II DTCs<\/a>. The repair process varies depending on what triggered the code and the vehicle&rsquo;s make and model.<\/p>\n\n\n\n<p>For instance, confirmed fixes for the P0155 code in a Ford, specifically a 2005 <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\/ford\/f-150\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Ford F-150\">Ford F-150<\/a> XL 5.4, include repairing the variable valve timing (VVT) solenoid wiring or the O2 sensor wiring. The same solution may not apply to a <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\/chevrolet\/trailblazer\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chevy Trailblazer\">Chevy Trailblazer<\/a> or a <a href=\"https:\/\/www.carparts.com\/blog\/jeep-grand-cherokee-reliability-and-common-problems\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Jeep Grand Cherokee\">Jeep Grand Cherokee<\/a> that triggered the code.&nbsp;&nbsp;<\/p>\n\n\n\n<p>If you are uncertain of your automotive aptitude, leaving the job to an expert may be your best option. Otherwise, diagnose the P0155 code. Once you&rsquo;ve established what triggered the code, determine the right fix with the help of <a href=\"https:\/\/www.carparts.com\/blog\/best-online-resources-to-help-you-learn-how-to-fix-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"online auto repair resources and guides\">online auto repair resources and guides<\/a>.&nbsp;<\/p>\n\n\n\n<p>Want to be prepared for any future issues that your vehicle may encounter? Secure an ALLDATA single-vehicle subscription to get comprehensive and up-to-date factory repair information.&nbsp;<\/p>\n\n\n\n<p>Finally, be sure to <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"consult your owner&rsquo;s manual\">consult your owner&rsquo;s manual<\/a> before attempting to resolve the issue. It&rsquo;ll help you avoid accidentally worsening the problem with a solution that&rsquo;s inappropriate for your vehicle&rsquo;s make and model.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A Quick Note About Oxygen Sensors and Bank Location<\/h2>\n\n\n\n<p>Oxygen sensors monitor the oxygen levels in the air that&rsquo;s going in and out of the <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>. They relay that data to the car&rsquo;s computer or powertrain control module (PCM), which utilizes the information from the downstream O2 sensor to gauge converter efficiency. Meanwhile, the PCM uses the information from the upstream O2 sensor to adjust the engine&rsquo;s air-fuel ratio.&nbsp;<\/p>\n\n\n\n<p>The sensors only function properly once they&rsquo;ve reached the ideal operating temperature. To raise their temperature quickly, they rely on PCM-controlled heating circuits.<\/p>\n\n\n\n<p>Sensor 1 is the heated O2 sensor unit located upstream of the catalytic converters. It determines if the component is breaking down the pollutants generated by the engine by monitoring the oxygen levels in the converter&rsquo;s exhaust.&nbsp;<\/p>\n\n\n\n<p>Typically located opposite of Bank 1, Bank 2 refers to the side of the engine that holds the number two cylinder.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Get a New Oxygen Sensor for Your Vehicle<\/h2>\n\n\n\n<p>Ignoring your vehicle&rsquo;s damaged O2 sensor will leave you spending more money at the pump, so make sure to address the issue right away. For a high-quality O2 sensor replacement that won&rsquo;t break the bank, shop right here at <a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a>.<\/p>\n\n\n\n<p>We have a great selection of precision-engineered <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"O2 sensor replacements\">O2 sensor replacements<\/a> that passed the highest quality control standards in the industry. These sensors were handpicked by automotive professionals, leaving no room for you to second guess their quality.<\/p>\n\n\n\n<p>Find the right part for your ride with only a few clicks. Simply enter your vehicle&rsquo;s year, make, and model into our vehicle selector to narrow down the catalog to compatible oxygen sensors for your daily driver. Shop from the comfort of your home, and check out securely in a matter of minutes.<\/p>\n\n\n\n<p>CarParts.com ships from strategically located warehouses across the US, so you can get the part you need delivered to your doorstep in as fast as two business days. Check out our selection of oxygen sensors 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\/repc960915_1\">\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\/repf960330_1\">\n<strong>Catalytic Converter<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n\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\/atalytic-converter\/evan-fischer\/set-repn960335ss-2\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label='&lt;img src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/set-repn960335ss-2_1\" alt=\"Evan Fischer&reg; &ndash; Front and Rear Catalytic Converters, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME)\" \/&gt;'><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/images\/set-repn960335ss-2_1\" alt=\"Evan Fischer&reg; &ndash; Front and Rear Catalytic Converters, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME)\"><\/a>\n                <\/div>\n\n                <div class=\"stp-desc\">\n                                            <p class=\"stp-title\">\n                            <a href=\"https:\/\/www.carparts.com\/details\/atalytic-converter\/evan-fischer\/set-repn960335ss-2\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Evan Fischer&reg; &ndash; Front and Rear Catalytic Converters, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME)\">Evan Fischer&reg; &ndash; Front and Rear Catalytic Converters, Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME)<\/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\">$299.99<\/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\/atalytic-converter\/evan-fischer\/set-repn960335ss-2\" 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>What is a P0155 code? Read on to learn about its possible causes, common symptoms, and everything else it entails&#8230;. <a href=\"https:\/\/www.carparts.com\/blog\/p0155-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-1\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":7729,"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-11279","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 v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Triggered the P0155 code? 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