{"id":85782,"date":"2023-06-21T23:39:53","date_gmt":"2023-06-22T06:39:53","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=85782"},"modified":"2025-02-25T17:46:46","modified_gmt":"2025-02-26T01:46:46","slug":"p1151-code-lack-of-upstream-heated-oxygen-sensor-switch-sensor-indicates-lean-bank-2","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p1151-code-lack-of-upstream-heated-oxygen-sensor-switch-sensor-indicates-lean-bank-2\/","title":{"rendered":"P1151 Code: Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column85782_8a638b-93 > .kt-inside-inner-col,.kadence-column85782_8a638b-93 > .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-column85782_8a638b-93 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column85782_8a638b-93 > .kt-inside-inner-col{flex-direction:column;}.kadence-column85782_8a638b-93 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column85782_8a638b-93 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column85782_8a638b-93{position:relative;}@media all and (max-width: 1024px){.kadence-column85782_8a638b-93 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column85782_8a638b-93 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column85782_8a638b-93 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-147d1b  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-caf9d2\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading85782_476aed-c8, .wp-block-kadence-advancedheading.kt-adv-heading85782_476aed-c8[data-kb-block=\"kb-adv-heading85782_476aed-c8\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading85782_476aed-c8 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading85782_476aed-c8[data-kb-block=\"kb-adv-heading85782_476aed-c8\"] 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-heading85782_476aed-c8 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading85782_476aed-c8[data-kb-block=\"kb-adv-heading85782_476aed-c8\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading85782_476aed-c8 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading85782_476aed-c8\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diagnostic trouble code (DTC) P1151 stands for &ldquo;Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2.&rdquo; The P1151 code indicates that elevated oxygen sensors are causing the heated O2 sensor in bank 2 to detect a &ldquo;lean&rdquo; mixture.<\/li>\n\n\n\n<li>The P1151 code can be caused by upstream oxygen sensor issues, low fuel pressure, engine vacuum leaks, fuel injector leaks, or a faulty powertrain control module (PCM).<\/li>\n\n\n\n<li>There are no drivability issues related to the P1151 code aside from 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>Your ride&rsquo;s <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module\">powertrain control module<\/a> (PCM) relies on data coming from your <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensors\">oxygen sensors<\/a> (O2 sensors) to help regulate <a href=\"https:\/\/www.carparts.com\/blog\/what-is-a-good-air-fuel-ratio-chart-included\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"air-to-fuel ratio\">air-to-fuel ratio<\/a>. These sensors measure oxygen content in the exhaust. Oxygen sensors are meant to last for a long time. However, this doesn&rsquo;t mean they&rsquo;re immune to faults or damage.<\/p>\n\n\n\n<p>There are numerous OBD codes related to a fault in the O2 sensors. P1151 is a trouble code specific to Ford vehicles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P1151 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) P1151 stands for &ldquo;Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2.&rdquo;<\/p>\n\n\n\n<p>The P1151 code indicates that elevated oxygen sensors are causing the heated O2 sensor in bank 2 to detect a &ldquo;lean&rdquo; mixture.<\/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\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-1024x681.jpg\" alt=\"heated oxygen sensor causing p1151 obd code\" class=\"wp-image-85783\" style=\"width:1024px;height:681px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-1024x681.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-768x511.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-1536x1021.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/06\/heated-oxygen-sensor-causing-p1151-obd-code.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">&nbsp;A heated oxygen sensor (HO2S) that indicates lean at the end of a test means that it&rsquo;s trying to compensate for an over-rich mixture.<\/figcaption><\/figure>\n\n\n\n<p>&nbsp;A heated oxygen sensor (HO2S) that indicates lean at the end of a test means that it&rsquo;s trying to compensate for an over-rich mixture. Specifically, the code is logged once the PCM detects that there&rsquo;s an excessive amount of oxygen in the mixture for a specific time frame set by Ford.<\/p>\n\n\n\n<p>For more information on how codes like P1151 are set, read our technical discussion about what <a href=\"https:\/\/www.carparts.com\/blog\/p0131-o2-sensor-circuit-low-voltage-bank-1-sensor-1\/#What_Do_Oxygen_Sensors_Do\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"oxygen sensors do\">oxygen sensors do<\/a>.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P1151 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 Common Causes of the P1151 Code?<\/h2>\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=\"Issues with upstream O2 sensor\">Issues with upstream O2 sensor<\/a> in Bank 2<\/li>\n\n\n\n<li>Low fuel pressure<\/li>\n\n\n\n<li>Engine vacuum leak<\/li>\n\n\n\n<li>Fuel pressure regulator or fuel injector leak<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Defective PCM\">Defective PCM<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What Are the Common Symptoms of the P1151 Code?<\/h2>\n\n\n\n<p>Aside from an illuminated check engine light, there are no drivability issues related to this trouble code. However, that doesn&rsquo;t mean that you shouldn&rsquo;t have your ride repaired once your scan tool logs this code. At worst, the system will remain in open loop and your fuel economy will suffer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P1151 Code<\/h2>\n\n\n\n<p>If you&rsquo;re not sure how to identify the root cause of the problem or can&rsquo;t replace the O2 sensor yourself, it&rsquo;s best to take your vehicle to an auto repair shop. A mechanic would know how to properly diagnose your vehicle. If you&rsquo;re an experienced DIYer, you can go ahead and do it yourself.<\/p>\n\n\n\n<div id=\"article-search-widget\">\n<div class=\"cp-search\">\n<div align=\"center\">\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/w_auto,dpr_auto\/carparts\/logos\/badge_wordmark\/full_color\/CP_LOGO_COLOUR_RGB\" alt=\"CarParts.com\" width=\"300\" height=\"56\">\n<\/div>\n<form id=\"cpsearchform\" name=\"cpsearchform\" action=\"https:\/\/www.carparts.com\/search\" method=\"get\" target=\"_blank\" accept-charset=\"character_set\" aria-label=\"search CarParts.com\">\n    <input type=\"text\" class=\"keyword\" name=\"q\" placeholder=\"Search for parts on CarParts.com\" value=\"\" aria-label=\"Search CarParts.com\"><input type=\"submit\" class=\"btn-search\" value=\"Search\" aria-label=\"Search\">\n<\/form>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P1151 Code<\/h2>\n\n\n<style>.kadence-column85782_2052de-fc > .kt-inside-inner-col,.kadence-column85782_2052de-fc > .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-column85782_2052de-fc > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column85782_2052de-fc > .kt-inside-inner-col{flex-direction:column;}.kadence-column85782_2052de-fc > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column85782_2052de-fc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column85782_2052de-fc{position:relative;}@media all and (max-width: 1024px){.kadence-column85782_2052de-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column85782_2052de-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column85782_2052de-fc kb-section-dir-vertical kb-section-sm-dir-vertical inner-column-1 pro-tip-widget\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id85782_a6a9d8-c5 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id85782_a6a9d8-c5 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id85782_a6a9d8-c5 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:20px;padding-right:16px;padding-bottom:20px;padding-left:16px;grid-template-columns:minmax(0, calc(10% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(90% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id85782_a6a9d8-c5 > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id85782_a6a9d8-c5 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id85782_a6a9d8-c5 > .kt-row-column-wrap{padding-top:28px;padding-right:16px;padding-bottom:25px;padding-left:16px;grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id85782_a6a9d8-c5 .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id85782_a6a9d8-c5 alignnone pro-tip-wrap wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-right-golden kt-tab-layout-right-golden kt-mobile-layout-right-golden kt-row-valign-top\">\n<style>.kadence-column85782_cce5aa-8d > .kt-inside-inner-col{display:flex;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col{min-height:45px;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col,.kadence-column85782_cce5aa-8d > .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-column85782_cce5aa-8d > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col > *, .kadence-column85782_cce5aa-8d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column85782_cce5aa-8d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column85782_cce5aa-8d{position:relative;}@media all and (max-width: 1024px){.kadence-column85782_cce5aa-8d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column85782_cce5aa-8d > .kt-inside-inner-col > *, .kadence-column85782_cce5aa-8d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column85782_cce5aa-8d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column85782_cce5aa-8d > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col > *, .kadence-column85782_cce5aa-8d > .kt-inside-inner-col > figure.wp-block-image, .kadence-column85782_cce5aa-8d > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column85782_cce5aa-8d > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column85782_cce5aa-8d kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image85782_316620-04.kb-image-is-ratio-size, .kb-image85782_316620-04 .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image85782_316620-04.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image85782_316620-04 .kb-image-is-ratio-size{align-self:unset;}.kb-image85782_316620-04 figure{max-width:45px;}.kb-image85782_316620-04 .image-is-svg, .kb-image85782_316620-04 .image-is-svg img{width:100%;}.kb-image85782_316620-04 .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image85782_316620-04\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/f_auto,dpr_auto,q_auto,c_pad\/carparts\/blog\/widgets\/protip\/services-icon\" alt=\"\" class=\"kb-img\"><\/figure><\/div>\n<\/div><\/div>\n\n\n<style>.kadence-column85782_026e23-ff > .kt-inside-inner-col,.kadence-column85782_026e23-ff > .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-column85782_026e23-ff > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column85782_026e23-ff > .kt-inside-inner-col{flex-direction:column;}.kadence-column85782_026e23-ff > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column85782_026e23-ff > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column85782_026e23-ff{position:relative;}@media all and (max-width: 1024px){.kadence-column85782_026e23-ff > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column85782_026e23-ff > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column85782_026e23-ff inner-column-2 pro-tip-item2\"><div class=\"kt-inside-inner-col\">\n<div class=\"protip-desc\">\n\t<div class=\"help-tip\">\n\t\t<p><strong>Pro Tips<\/strong> are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.<\/p>\n\t<\/div>\n    <div class=\"help-caption\">\n        <p>\n            <strong>Pro Tip:<\/strong>\n            <span>Most DIYers replace the O2 sensor, which doesn&rsquo;t hurt a thing and is a good first start. If you do that and clear the code and it doesn&rsquo;t return, you&rsquo;re all set.<\/span>\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<p>It&rsquo;s also best to make sure you have the right repair guide before you get started. You can find vehicle-specific guides from resources like Chilton or an ALLDATA subscription.<\/p>\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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Your ride&rsquo;s powertrain control module (PCM) relies on data coming from your oxygen sensors (O2 sensors) to help regulate air-to-fuel&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p1151-code-lack-of-upstream-heated-oxygen-sensor-switch-sensor-indicates-lean-bank-2\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":85784,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":true,"_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-85782","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 v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P1151 Code: Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2 - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Did your scan tool retrieve a P1151 code? Read this article to learn more about this trouble code and how to diagnose it.\" \/>\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\/p1151-code-lack-of-upstream-heated-oxygen-sensor-switch-sensor-indicates-lean-bank-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P1151 Code: Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2 - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Did your scan tool retrieve a P1151 code? 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Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust."},{"term_id":2985,"user_id":1646,"is_guest":0,"slug":"richardmccuistian","display_name":"Richard McCuistian, ASE Certified Master Automobile Technician","avatar_url":{"url":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png","url2x":"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2021\/11\/richard-mccuistian.png"},"author_category":"","user_url":"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/","last_name":"McCuistian","first_name":"Richard","job_title":"ASE Certified Master Automobile Technician","description":"<div class=\"auth-social-links\"><a href=\"https:\/\/www.linkedin.com\/in\/richard-mccuistian-2681891b\/\" class=\"btn\" rel=\"nofollow noopener\" target=\"_blank\" aria-label=\"linkedin\" aria-labelledby=\"linkedin\">LinkedIn<\/a><a href=\"https:\/\/www.youtube.com\/user\/McCuistian\" class=\"btn\" rel=\"nofollow noopener\" target=\"_blank\" aria-label=\"instagram\" aria-labelledby=\"instagram\">Youtube<\/a><\/div>\r\n\r\nRichard McCuistian grew up in Alabama learning from his father who ran an automotive repair shop. Richard has worked for nearly 50 years in the automotive field as a professional technician, an instructor, a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others (published every year since May 2000). He has developed training courses and written or edited training material for companies in the U.S. Canada, and the Netherlands, and even Bulgaria. He maintained an \u201cask a mechanic\u201d website for 10 years answering questions emailed to him from all over the world.\r\n\r\nRichard has an instructional automotive YouTube channel \u201cMcCuistian\u201d with 13,500 subscribers and over 1,300 videos. Much of his professional work requires photography and videography in shop environments, but Richard also enjoys taking pictures of landscapes, skyscapes, old barns and houses, small towns. He has produced a coffee table book of digital watercolors called \u201cMemories of South Alabama\u201d created from his personal photos, along with a dozen Christian fiction short original novels and a collection of short stories, all available in Kindle or softcover format. Richard has written a 2,500-word Bible study every week for the past 20 years and uses it to teach a small group at his church every Sunday morning.\r\n\r\n<strong>Credentials:<\/strong>\r\n\r\n<ul class=\"author-list\">\r\n<li><p>ASE Certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.<\/p><\/li>\r\n<li><p>Professional Mechanic\/Technician for 25 years with experience on diesel and gasoline engines, vehicles and equipment (including hydraulics).<\/p><\/li>\r\n<li><p>Spent 5 years in fleet maintenance, 20 years in independent shops and dealerships (VW, Mazda, Renault, Jeep, Ford, Lincoln), specializing in driveability and electronics for the last 14 years of his career at the same dealership.<\/p><\/li>\r\n<li><p>Senior Contributing Editor at Motor Age Magazine, first published in Motor Age in May of 2000 and every year since. He has won two International Automotive Media Awards for technical articles published in trade magazines.<\/p><\/li>\r\n<li><p>Has attended hundreds of hours of automotive training from OEMs including GM, Volkswagen, Mazda, Renault, Jeep, Chrysler, as well as additional training at events like KC Vision and MACS (Mobile Air Climate Systems Association).<\/p><\/li>\r\n<li><p>Taught college level auto mechanics for 19 years.<\/p><\/li>\r\n<li><p>Has written for automotive training companies (including course development work for training companies in Canada and the Netherlands) and has been hired to teach professional trade show technician courses at multiple training events in Texas and Alabama.<\/p><\/li>\r\n<li><p>While still teaching at the college level, Richard launched a new automotive program in Geneva, Alabama, setting up a dual enrollment department in a new building, organizing the shop and classroom, teaching morning classes to high school students for 2 years while still teaching at the college in the afternoon.<\/p><\/li>\r\n<li><p>Richard\u2019s college program at Lurleen B. Wallace Community College worked at professional shop speed during his tenure to prepare graduates for production level work in the real world.<\/p><\/li>\r\n<\/ul>"}],"_links":{"self":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/85782","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/comments?post=85782"}],"version-history":[{"count":0,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/posts\/85782\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media\/85784"}],"wp:attachment":[{"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/media?parent=85782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/categories?post=85782"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/tags?post=85782"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.carparts.com\/blog\/wp-json\/wp\/v2\/ppma_author?post=85782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}