{"id":16334,"date":"2022-04-19T01:28:00","date_gmt":"2022-04-19T08:28:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=16334"},"modified":"2026-02-09T19:59:32","modified_gmt":"2026-02-10T03:59:32","slug":"p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1\/","title":{"rendered":"P2198 Code: O2 Sensor Signal Biased\/Stuck Rich (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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column16334_aede54-9c > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column16334_aede54-9c > .kt-inside-inner-col,.kadence-column16334_aede54-9c > .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-column16334_aede54-9c > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column16334_aede54-9c > .kt-inside-inner-col{flex-direction:column;}.kadence-column16334_aede54-9c > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column16334_aede54-9c > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column16334_aede54-9c{position:relative;}@media all and (max-width: 1024px){.kadence-column16334_aede54-9c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column16334_aede54-9c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column16334_aede54-9c inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-2bf734  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-d32d59\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading16334_541d30-6c, .wp-block-kadence-advancedheading.kt-adv-heading16334_541d30-6c[data-kb-block=\"kb-adv-heading16334_541d30-6c\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading16334_541d30-6c mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading16334_541d30-6c[data-kb-block=\"kb-adv-heading16334_541d30-6c\"] 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-heading16334_541d30-6c img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading16334_541d30-6c[data-kb-block=\"kb-adv-heading16334_541d30-6c\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading16334_541d30-6c summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading16334_541d30-6c\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The P2198 code stands for &ldquo;O2 Sensor Signal Biased\/Stuck Rich (Bank 2 Sensor 1).&rdquo;<\/li>\n\n\n\n<li>It&rsquo;s logged when the PCM detects that the signal produced by the upstream sensor is relaying a rich condition for an extended period.<\/li>\n\n\n\n<li>Common causes include a failed oxygen sensor, wiring issues, a rich running condition, and PCM issues.<\/li>\n\n\n\n<li>Rough running, poor acceleration, and increased fuel consumption are two symptoms to look out for.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>One type of sensor that provides critical data to the PCM is the oxygen sensor. The upstream oxygen sensor tracks the amount of air in the engine to determine whether it is running in a rich or lean condition. &nbsp;If the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> identifies an issue in the signals coming from this sensor, it may log the P2198 code.<\/p>\n\n\n\n<p>Below is some general information about the P2198 code that can help you understand the possible causes of this trouble code and how to fix it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2198 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) P2198 stands for &ldquo;O2 Sensor Signal Biased\/Stuck Rich (Bank 2 Sensor 1). It is triggered when the PCM detects that the signal produced by the upstream sensor has been relaying a rich condition (too much fuel) for an extended period.<\/p>\n\n\n\n<p>This DTC refers to the oxygen sensor that measures the oxygen levels of the exhaust stream between the engine and <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>. It does not refer to the downstream oxygen sensor behind the converter.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2-1024x681.jpeg\" alt=\"oxygen sensor 2 2\" class=\"wp-image-16341\" style=\"width:1024px;height:681px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2-1024x681.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2-300x200.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2-768x511.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2-600x400.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2-150x100.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-2-2.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">If the PCM determines that the sensor consistently produces a signal above 0.45 volts, it will set the code P2198.<\/figcaption><\/figure>\n\n\n\n<p>An upstream zirconia oxygen sensor continually produces a signal that switches between rich (above 0.45 volts) and lean (below 0.45 volts). If the PCM determines that the sensor consistently produces a signal above 0.45 volts, it will set the code P2198.<\/p>\n\n\n\n<p>Make sure you know exactly where <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> are before you attempt any DIY diagnosis or troubleshooting for code P2198. Reading up on <a href=\"https:\/\/www.carparts.com\/blog\/p0174-system-too-lean-cylinder-bank-2\/#More_About_P0174_and_Lean_Rich_Codes\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"lean and rich trouble codes\">lean and rich trouble codes<\/a> as well as <a href=\"https:\/\/www.carparts.com\/blog\/p0172-code-fuel-system-too-rich-bank-1\/#An_In-Depth_Look_at_Air-Fuel_Mixture_and_How_It_Could_Cause_an_OBD_Code_to_Be_Stored\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air-fuel mixture\">air-fuel mixture<\/a> can also give you more knowledge that can help you understand P2198 better if you&rsquo;re thinking about fixing it yourself.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P2198<\/em><strong><em> <\/em><\/strong><em>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 P2198 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oxygen sensor failure<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Wiring issue\">Wiring issue<\/a> or poor connection<\/li>\n\n\n\n<li>Rich running condition (e.g., fuel pressure too high or a leaking fuel injector)<\/li>\n\n\n\n<li>PCM failure<\/li>\n\n\n\n<li>PCM software needs to be updated<\/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 P2198 Code?<\/h2>\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 illuminated\">Check Engine Light is illuminated<\/a><\/li>\n\n\n\n<li>Poor engine performance, such as rough running and lack of acceleration&nbsp;<\/li>\n\n\n\n<li>Increased fuel consumption<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2198 Code<\/h2>\n\n\n\n<p>Identifying the underlying cause of the P2198<strong> <\/strong>code can be difficult, especially if you&rsquo;re not confident with your automotive knowledge. In most cases, it would be best to bring your vehicle to an auto repair shop and seek the help of a professional for an accurate diagnosis.<\/p>\n\n\n\n<p>Here is a video that can help give you a better idea of how this trouble code may be diagnosed:<\/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=\"Ford Taurus Lean Codes (P0171 &amp; P0174) with Rich Bank 2 (P2198)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Jr_Qg8w9GRI?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 P2198 Code<\/h2>\n\n\n\n<p>The P2198 code is a generic trouble code that may apply to various makes and models. While vehicles from different manufacturers may share common symptoms, the steps for diagnosis and repair for a P2198 Ford code may differ from a P2198 Toyota code.<\/p>\n\n\n\n<p>If you&rsquo;re an advanced DIYer who&rsquo;d like to fix this code on your own, it will be helpful to refer to your repair manual or get factory vehicle repair information from an <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 subscription service\">online subscription service<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where To Get Parts To Resolve the P2198 Code<\/h2>\n\n\n\n<p>Oftentimes you&rsquo;ll find that the P2198 code is caused by a faulty oxygen sensor or wiring issues, leading to decreased vehicle performance and increased fuel consumption. To address the P2198 code and return your vehicle&rsquo;s performance to what it once was, you might need to replace its problematic parts. Thankfully, ordering new parts is easy at CarParts.com.<\/p>\n\n\n\n<p>Ordering parts from CarParts.com takes just a few clicks. Our vehicle selector allows you to enter your vehicle&rsquo;s year, make, and model to ensure you only get parts that fit. With our 60-day return policy and price match guarantee, you can make your purchases with confidence at <a href=\"http:\/\/carparts.com\" target=\"_blank\" rel=\"noreferrer noopener nofollow\" aria-label=\"CarParts.com\">CarParts.com<\/a>. Get your money&rsquo;s worth by picking from our wide selection of quality aftermarket parts. If you have questions or concerns, we offer round-the-clock support through our friendly and helpful customer service team.<\/p>\n\n\n\n<p>Place your order for a new <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensor\">oxygen sensor<\/a> and other parts at CarParts.com 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\/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\/repn960316_1\" alt=\"Catalytic Converter\">\n<strong>Catalytic Converter<\/strong>\n<\/a>\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\n<!-- end of editable content -->\n<\/a><\/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\"> 4<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>One type of sensor that provides critical data to the PCM is the oxygen sensor. The upstream oxygen sensor tracks&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":16340,"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-16334","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>P2198 Code: O2 Sensor Signal Biased\/Stuck Rich (Bank 2 Sensor 1) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Read on to find out what the P2198 code means, its possible causes and symptoms, and the potential fixes you can use to resolve this error 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\/p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2198 Code: O2 Sensor Signal Biased\/Stuck Rich (Bank 2 Sensor 1) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Read on to find out what the P2198 code means, its possible causes and symptoms, and the potential fixes you can use to resolve this error code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1\/\" \/>\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=\"2022-04-19T08:28:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-10T03:59:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/09\/oxygen-sensor-4-1.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\\\/p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2198-code-o2-sensor-signal-biased-stuck-rich-bank-2-sensor-1\\\/\"},\"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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