{"id":15171,"date":"2022-03-15T03:08:00","date_gmt":"2022-03-15T10:08:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=15171"},"modified":"2026-02-10T18:43:19","modified_gmt":"2026-02-11T02:43:19","slug":"p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\/","title":{"rendered":"P0161 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 2)"},"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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column15171_7aaedf-4e > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column15171_7aaedf-4e > .kt-inside-inner-col,.kadence-column15171_7aaedf-4e > .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-column15171_7aaedf-4e > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column15171_7aaedf-4e > .kt-inside-inner-col{flex-direction:column;}.kadence-column15171_7aaedf-4e > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column15171_7aaedf-4e > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column15171_7aaedf-4e{position:relative;}@media all and (max-width: 1024px){.kadence-column15171_7aaedf-4e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column15171_7aaedf-4e > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column15171_7aaedf-4e inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-20dcbe  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-39dff5\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading15171_8e586b-12, .wp-block-kadence-advancedheading.kt-adv-heading15171_8e586b-12[data-kb-block=\"kb-adv-heading15171_8e586b-12\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading15171_8e586b-12 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading15171_8e586b-12[data-kb-block=\"kb-adv-heading15171_8e586b-12\"] 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-heading15171_8e586b-12 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading15171_8e586b-12[data-kb-block=\"kb-adv-heading15171_8e586b-12\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading15171_8e586b-12 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading15171_8e586b-12\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble code (DTC) P0161 stands for &ldquo;O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 2).&rdquo; This means the powertrain control module (PCM) has received questionable changes or fluctuations in input from one of the downstream oxygen sensors.<\/li>\n\n\n\n<li>On Chevrolet vehicles, code P0161 appears when the vehicle control module (VCM) fails to detect a minimum number of voltage transitions above and below the bias range during the test period.<\/li>\n\n\n\n<li>Common causes of the P0161 code include a faulty oxygen sensor, issues with the oxygen sensor heater circuit, and a faulty PCM.<\/li>\n\n\n\n<li>Oddly enough, it&rsquo;s possible not to experience any noticeable symptoms alongside code P0161 other than an illuminated check engine light.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The best way to diagnose an issue with your car is by using a scan tool. This is imperative if the check engine light is on. However, the troubleshooting doesn&rsquo;t stop there&#8288;&mdash;the scan tool will display a code composed of letters and numbers, but you&rsquo;ll have to do some research to figure out what it means before you can resolve it.<\/p>\n\n\n\n<p>If you&rsquo;re reading this article, you&rsquo;ve probably seen that your vehicle is displaying code P0161 on your scanner.<\/p>\n\n\n\n<p>Here&rsquo;s a guide to the important things you&rsquo;ll need to know about the P0161 code, including its definition, causes, symptoms, and more.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"727\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-P0161-1-1024x727.jpeg\" alt=\"oxygen sensor P0161\" class=\"wp-image-67647\" style=\"width:1024px;height:727px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-P0161-1-1024x727.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-P0161-1-300x213.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-P0161-1-768x545.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-P0161-1-150x107.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-P0161-1.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Code P0161 indicates that there is an issue with the Bank 2, Sensor 2 O2 sensor&rsquo;s heater circuit.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0161 Code Mean?<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Diagnostic trouble code\">Diagnostic trouble code<\/a> (DTC) P0161 stands for &ldquo;O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 2).&rdquo; It warns about an issue with the Bank 2, Sensor 2 oxygen (O2) sensor&rsquo;s heater circuit. <\/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>Code P0161 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>Modern oxygen sensors come with heating elements so that they heat up to the ideal operating temperature quickly. They provide feedback to the car&rsquo;s computer or the powertrain control module (PCM). The heating circuit helps reduce the period in which the sensors are not able to send data to the PCM.<\/p>\n\n\n\n<p>The PCM uses the data from the heated oxygen sensors to calculate the right ratio of fuel delivery and monitor the catalytic converter&rsquo;s performance.<\/p>\n\n\n\n<p>The Sensor 2 portion of the code&rsquo;s definition refers to the downstream sensor, which is technically known as Sensor 2. It is located behind the catalytic converter and its primary purpose is to check the amount of oxygen in the exhaust gas after leaving the catalytic converter. Note that if the upstream O2 sensor is deemed untrustworthy by the ECM\/PCM, many platforms will begin to use the downstream sensor as a feedback signal for fuel control.<\/p>\n\n\n\n<p>The PCM constantly monitors the signals coming from the heated oxygen sensors. If there&rsquo;s a questionable change or fluctuation in the inputs, the PCM will issue their respective codes.<\/p>\n\n\n\n<p>The P0161 code only applies to cars with V6  or V8 engines. If your vehicle only has four cylinders, it will only have one bank and, typically, one downstream sensor, so it can&rsquo;t trigger this code. Instead, a faulty downstream heated oxygen sensor will be set as <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 or Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)\">P0141 or Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)<\/a>.<\/p>\n\n\n\n<p>You can read our brief discussion about <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=\"bank 1 and bank 2\">bank 1 and bank 2<\/a> if you need help locating the oxygen sensor that&rsquo;s possibly faulty. If you&rsquo;re planning a DIY fix for P0161, it&rsquo;s also a good idea to brush up on <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=\"why oxygen sensors need to be heated\">why oxygen sensors need to be heated<\/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\/2020\/08\/faulty-oxygen-sensor-1024x683.jpeg\" alt=\"faulty oxygen sensor\" class=\"wp-image-15204\" style=\"width:1024px;height:683px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/faulty-oxygen-sensor-1024x683.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/faulty-oxygen-sensor-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/faulty-oxygen-sensor-768x512.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/faulty-oxygen-sensor-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/faulty-oxygen-sensor-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/faulty-oxygen-sensor.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">A faulty oxygen sensor can trigger code P0161.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">P0161 on Some Chevrolet Vehicles<\/h3>\n\n\n\n<p>Code P0161 may appear on some Chevy vehicles. The diagnostic trouble code (DTC) determines if the HO2S is functioning properly. It checks for an adequate number of HO2S voltage transitions above and below the bias range of 300&ndash;600 mV. This DTC is set when the vehicle control module (VCM) fails to detect a minimum number of voltage transitions above and below the bias range during the test period.<\/p>\n\n\n\n<p>On a 1999 Chevrolet Silverado 1500 4.3L V6, for example, this DTC can be caused by the following conditions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>An open or a short to voltage on either the HO2S signal or HO2S low circuits<\/li>\n\n\n\n<li>A malfunctioning HO2S<\/li>\n\n\n\n<li>A problem in the HO2S heater or its circuit<\/li>\n\n\n\n<li>A faulty HO2S ground<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Possible Causes of the P0161 Code? <\/h2>\n\n\n\n<p>What causes the P0161 code? There are a couple of reasons why the PCM could set the code P0161:<\/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 circuit (i.e., an open, a short, or high resistance)<\/li>\n\n\n\n<li>An issue with the PCM<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P0161 Code?<\/h2>\n\n\n\n<p>It is possible that you won&rsquo;t experience any noticeable symptoms along with a code P0161. The only symptom that may alert you to the issue is an <a href=\"\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"illuminated check engine light\">illuminated check engine light<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0161 Code <\/h2>\n\n\n\n<p>If you have an old O2 sensor that fits your vehicle, you can cut the wires off the sensor and connect a tail light bulb to the heater wires. Those will be two of the four wires that are the same color. They&rsquo;ll be a different color from the other two wires, which are signal and signal ground for the sensor.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>If you have an old O2 sensor that fits your vehicle, you can cut the wires off the sensor and connect a tail light bulb to the heater wires.<\/p>\n<cite><em>&ndash;&nbsp;<\/em><a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<p>Once you&rsquo;ve created that tool, you can connect it to the wire harness so that if the heater is receiving voltage from the ECM\/PCM, the bulb will light. Typically, the heater will begin to receive voltage as soon as the key is turned to the ON position, even before the engine is started.<\/p>\n\n\n\n<p>If you don&rsquo;t see the light illuminate, you&rsquo;ll need to check fuses and circuits visually to see what you can see. But don&rsquo;t replace the ECM\/PCM for this; usually it&rsquo;s <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wiring\">wiring<\/a> or connectors. But if the light <strong>does<\/strong> illuminate, remove the O2 sensor and check the resistance of the heater. <strong>It should be around 6 ohms or so<\/strong>. The heaters do fail to open sometimes and that&rsquo;s the most common cause of code P0161.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/old-oxygen-sensor-1024x768.jpg\" alt=\"old oxygen sensor\" class=\"wp-image-67655\" style=\"width:1024px;height:768px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/old-oxygen-sensor-1024x768.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/old-oxygen-sensor-300x225.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/old-oxygen-sensor-768x576.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/old-oxygen-sensor-150x113.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/old-oxygen-sensor.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">If you have an old O2 sensor that fits your vehicle, you can cut the wires off the sensor and connect a tail light bulb to the heater wires and connect it to the wire harness so that if the heater is receiving voltage from the ECM\/PCM, the bulb will light.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0161 Code <\/h2>\n\n\n\n<p>There&rsquo;s no single way of fixing the code P0161. Different carmakers have their own specific repair instructions for the DTC, so what works for one model may not work for a different one.<\/p>\n\n\n\n<p>Once you&rsquo;ve figured out the underlying cause, the next step is to figure out what specific repair will work for the issue. Do some research online to find out some possible fixes for your code, keeping in mind to stick to anecdotes from other DIY-ers with the same vehicle as yours.<\/p>\n\n\n\n<p>For example, certain <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\/chevrolet\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Chevrolet\">Chevrolet<\/a> owners have reported success with replacing the offending O2 sensor&#8288;&mdash;but that&rsquo;s not to say that this would automatically work for a <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> that is experiencing the same code.<\/p>\n\n\n\n<p>Another reminder&#8288;&mdash;use a repair manual whenever you&rsquo;re working on something in your car. When in doubt, it&rsquo;s better to seek help from a professional mechanic.<\/p>\n\n\n\n<p>If you wish to personally work on your car, you may opt to invest in an ALLDATA single-vehicle subscription. This is helpful not only for this specific repair, but also for other issues you may encounter in the future.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where to Find a Heated Oxygen Sensor for Your Ride<\/h2>\n\n\n\n<p>If your vehicle&rsquo;s OBD scan tool reads the code P0161, you can be dealing with an issue with one of your oxygen sensor heater circuits. Fortunately, sourcing a new oxygen sensor for your ride is quick and easy.<\/p>\n\n\n\n<p>There&rsquo;s no need to venture out of your home to get an <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensor replacement\">oxygen sensor replacement<\/a>. Simply visit <a href=\"https:\/\/www.carparts.com\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"CarParts.com\">CarParts.com<\/a>, and explore our wide array of oxygen sensor replacement options designed to work just like your factory sensor.<\/p>\n\n\n\n<p>All our oxygen sensor replacements are engineered to ensure a precise fit, eliminating any compatibility issues. Make sure to input your ride&rsquo;s accurate details, including the model year, into our vehicle selector to guarantee the right part for your car.<\/p>\n\n\n\n<p>Need parts for urgent repairs? Don&rsquo;t worry. Our distribution centers are strategically located across the country to ensure swift delivery. You can expect your orders in just a few days.<\/p>\n\n\n\n<p>Clear trouble codes with ease by shopping for quality replacement parts. Dive into our comprehensive catalog today and take advantage of fantastic deals on quality oxygen sensors!<\/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\/set-repb960901-2_1\" alt=\"Oxygen Sensor\">\n<strong>Oxygen Sensor<\/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\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\/catalytic-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\/catalytic-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\/catalytic-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\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>The best way to diagnose an issue with your car is by using a scan tool. This is imperative if&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":15206,"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-15171","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 v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0161 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 2) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Address the P0161 code with this helpful guide about its possible causes, common symptoms, diagnostic process, and more. Read on.\" \/>\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\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0161 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 2) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Address the P0161 code with this helpful guide about its possible causes, common symptoms, diagnostic process, and more. Read on.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\/\" \/>\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=\"2022-03-15T10:08:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-11T02:43:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/oxygen-sensor-bank-2.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=\"10 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0161-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-2\\\/\"},\"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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