{"id":91356,"date":"2023-09-11T15:32:47","date_gmt":"2023-09-11T22:32:47","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=91356"},"modified":"2025-08-29T02:06:36","modified_gmt":"2025-08-29T09:06:36","slug":"where-are-oxygen-sensors-located","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/where-are-oxygen-sensors-located\/","title":{"rendered":"Where Are Oxygen Sensors Located?"},"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-column91356_c27310-e5 > .kt-inside-inner-col,.kadence-column91356_c27310-e5 > .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-column91356_c27310-e5 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column91356_c27310-e5 > .kt-inside-inner-col{flex-direction:column;}.kadence-column91356_c27310-e5 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column91356_c27310-e5 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column91356_c27310-e5{position:relative;}@media all and (max-width: 1024px){.kadence-column91356_c27310-e5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column91356_c27310-e5 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column91356_c27310-e5 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-6b1edd  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-4920b8\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading91356_a13c4f-9e, .wp-block-kadence-advancedheading.kt-adv-heading91356_a13c4f-9e[data-kb-block=\"kb-adv-heading91356_a13c4f-9e\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading91356_a13c4f-9e mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading91356_a13c4f-9e[data-kb-block=\"kb-adv-heading91356_a13c4f-9e\"] 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-heading91356_a13c4f-9e img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading91356_a13c4f-9e[data-kb-block=\"kb-adv-heading91356_a13c4f-9e\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading91356_a13c4f-9e summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading91356_a13c4f-9e\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oxygen sensors are typically located in the exhaust system. In most modern vehicles, you can find two sensors near the motor and two sensors near your catalytic converter. An oxygen sensor resembles a spark plug.<\/li>\n\n\n\n<li>If you&rsquo;re accessing the oxygen sensors because of a fault code, you&rsquo;ll have to be sure which particular sensor needs to be inspected or replaced.<\/li>\n\n\n\n<li>If you&rsquo;re removing and reinstalling the same sensor, use some anti-seize compound on the threads.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Q: Where Are the Oxygen Sensors Typically Located?<\/h2>\n\n\n\n<p>A: <a href=\"https:\/\/www.carparts.com\/oxygen-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Oxygen sensors\">Oxygen sensors<\/a> are located in the vehicle&rsquo;s exhaust system. Most vehicles are equipped with two oxygen sensors. An upstream oxygen sensor is mounted before the catalytic converter. Meanwhile, a downstream sensor is mounted after the cat-con.<\/p>\n\n\n\n<p>Oxygens sensors measure the amount of oxygen in the exhaust. Your vehicle&rsquo;s powertrain control module (PCM) uses the data from these sensors to calculate the proper amount of fuel needed by the engine. The input from the downstream sensor is also used to monitor the health of your catalytic converter.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"628\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/o2-sensor-diagram-1024x628.jpg\" alt=\"diagram of an o2 sensor\" class=\"wp-image-94422\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/o2-sensor-diagram-1024x628.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/o2-sensor-diagram-300x184.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/o2-sensor-diagram-768x471.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/o2-sensor-diagram-150x92.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/10\/o2-sensor-diagram.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Diagrams showing where O2 sensors are located on V engines. Note that these do not include I4 or I6 engines. | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Tips on How to Access the Oxygen Sensors<\/h2>\n\n\n<style>.kadence-column91356_c06f82-67 > .kt-inside-inner-col,.kadence-column91356_c06f82-67 > .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-column91356_c06f82-67 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column91356_c06f82-67 > .kt-inside-inner-col{flex-direction:column;}.kadence-column91356_c06f82-67 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column91356_c06f82-67 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column91356_c06f82-67{position:relative;}@media all and (max-width: 1024px){.kadence-column91356_c06f82-67 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column91356_c06f82-67 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column91356_c06f82-67 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-id91356_75d484-2f > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id91356_75d484-2f > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id91356_75d484-2f > .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:32px;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-id91356_75d484-2f > .kt-row-layout-overlay{opacity:0.00;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-bottom-sep{height:100px;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-bottom-sep svg{width:100%;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-bottom-sep svg{fill:#ffffff!important;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-top-sep{height:100px;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-top-sep svg{width:100%;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-top-sep svg{fill:#ffffff!important;}@media all and (max-width: 1024px){.kb-row-layout-id91356_75d484-2f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr) minmax(0, 2fr);}}@media all and (max-width: 1024px){.kb-row-layout-id91356_75d484-2f .kt-row-layout-bottom-sep{height:px;}}@media all and (max-width: 1024px){.kb-row-layout-id91356_75d484-2f .kt-row-layout-bottom-sep svg{width:%;}}@media all and (max-width: 767px){.kb-row-layout-id91356_75d484-2f > .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-id91356_75d484-2f .kt-row-layout-bottom-sep{height:px;}.kb-row-layout-id91356_75d484-2f .kt-row-layout-bottom-sep svg{width:%;}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id91356_75d484-2f 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-column91356_a79544-94 > .kt-inside-inner-col{display:flex;}.kadence-column91356_a79544-94 > .kt-inside-inner-col{min-height:45px;}.kadence-column91356_a79544-94 > .kt-inside-inner-col,.kadence-column91356_a79544-94 > .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-column91356_a79544-94 > .kt-inside-inner-col{row-gap:0px;column-gap:0px;}.kadence-column91356_a79544-94 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}.kadence-column91356_a79544-94 > .kt-inside-inner-col > *, .kadence-column91356_a79544-94 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column91356_a79544-94 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column91356_a79544-94 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}.kadence-column91356_a79544-94 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column91356_a79544-94{position:relative;}@media all and (max-width: 1024px){.kadence-column91356_a79544-94 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;align-items:center;}}@media all and (min-width: 768px) and (max-width: 1024px){.kadence-column91356_a79544-94 > .kt-inside-inner-col > *, .kadence-column91356_a79544-94 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column91356_a79544-94 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column91356_a79544-94 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}@media all and (max-width: 767px){.kadence-column91356_a79544-94 > .kt-inside-inner-col{flex-direction:row;flex-wrap:wrap;justify-content:flex-start;}.kadence-column91356_a79544-94 > .kt-inside-inner-col > *, .kadence-column91356_a79544-94 > .kt-inside-inner-col > figure.wp-block-image, .kadence-column91356_a79544-94 > .kt-inside-inner-col > figure.wp-block-kadence-image{margin-top:0px;margin-bottom:0px;}.kadence-column91356_a79544-94 > .kt-inside-inner-col > .kb-image-is-ratio-size{flex-grow:1;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column91356_a79544-94 kb-section-dir-horizontal kb-section-md-dir-horizontal inner-column-1 pro-tip-item1\"><div class=\"kt-inside-inner-col\"><style>.kb-image91356_2c7424-1c.kb-image-is-ratio-size, .kb-image91356_2c7424-1c .kb-image-is-ratio-size{max-width:45px;width:100%;}.wp-block-kadence-column > .kt-inside-inner-col > .kb-image91356_2c7424-1c.kb-image-is-ratio-size, .wp-block-kadence-column > .kt-inside-inner-col > .kb-image91356_2c7424-1c .kb-image-is-ratio-size{align-self:unset;}.kb-image91356_2c7424-1c figure{max-width:45px;}.kb-image91356_2c7424-1c .image-is-svg, .kb-image91356_2c7424-1c .image-is-svg img{width:100%;}.kb-image91356_2c7424-1c .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image91356_2c7424-1c\"><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-column91356_b89bff-9b > .kt-inside-inner-col,.kadence-column91356_b89bff-9b > .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-column91356_b89bff-9b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column91356_b89bff-9b > .kt-inside-inner-col{flex-direction:column;}.kadence-column91356_b89bff-9b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column91356_b89bff-9b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column91356_b89bff-9b{position:relative;}@media all and (max-width: 1024px){.kadence-column91356_b89bff-9b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column91356_b89bff-9b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column91356_b89bff-9b 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            Do the procedures below with a cold engine so you won&rsquo;t get burned. There&rsquo;s no reason to warm the engine or the exhaust.\n        <\/p>\n    <\/div>\n<\/div>\n<\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n\n\n<!-- Either there are no banners, they are disabled or none qualified for this location! -->\n\n\n\n<div class=\"rsi-card\">\n  <div class=\"rsi-thumb\">\n    <img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/d_noimage.jpg\/b_white\/e_sharpen,e_auto_brightness,e_auto_contrast\/f_auto\/q_auto:eco,dpr_auto\/w_873,h_873,c_pad\/images\/repn960911_1\">\n  <\/div>\n  <div class=\"rsi-info\">\n    <span class=\"rsi-title\">The Best Oxygen Sensor Brands: Trusted Replacements for Smooth Driving<\/span>\n    <span class=\"rsi-desc\">See which oxygen sensor brands are best for your vehicle. Learn about application, quality, and cost, and find reliable replacement brands.<\/span>\n    <a href=\"https:\/\/www.carparts.com\/blog\/the-best-oxygen-sensor-brands-trusted-replacements-for-smooth-driving-quickref\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Discover Your Options\">Discover Your Options<\/a>\n  <\/div>\n<\/div>\n\n\n<p>In most modern vehicles, you can find two sensors near the motor and two sensors near your catalytic converter. An oxygen sensor resembles a spark plug. It looks like a small metal device with wires coming out of it.<\/p>\n\n\n\n<div class=\"wp-block-data443-irp-shortcode irp-shortcode\"><div style=\"clear:both; margin-top:0em; margin-bottom:1em;\"><a href=\"https:\/\/www.carparts.com\/blog\/p0155-code-oxygen-sensor-heater-circuit-malfunction-bank-2-sensor-1\/\" target=\"_self\" rel=\"dofollow\" class=\"u5babea21126fe91f30010517f2f797eb\"><style> .u5babea21126fe91f30010517f2f797eb { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea; border:0!important; border-left:4px solid #34495E!important; text-decoration:none; } .u5babea21126fe91f30010517f2f797eb:active, .u5babea21126fe91f30010517f2f797eb:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; text-decoration:none; } .u5babea21126fe91f30010517f2f797eb { transition: background-color 250ms; webkit-transition: background-color 250ms; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; } .u5babea21126fe91f30010517f2f797eb .ctaText { font-weight:bold; color:#464646; text-decoration:none; font-size: 16px; } .u5babea21126fe91f30010517f2f797eb .postTitle { color:#000000; text-decoration: underline!important; font-size: 16px; } .u5babea21126fe91f30010517f2f797eb:hover .postTitle { text-decoration: underline!important; } <\/style><div style=\"padding-left:1em; padding-right:1em;\"><span class=\"ctaText\">See also<\/span>&nbsp; <span class=\"postTitle\">P0155 Code: Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)<\/span><\/div><\/a><\/div><\/div>\n\n\n\n<p>If you&rsquo;re accessing the oxygen sensors because of a <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fault code\">fault code<\/a>, you&rsquo;d have to be sure which particular sensor needs to be inspected and\/or replaced.<\/p>\n\n\n\n<p>You&rsquo;ll usually need a special tool (there are several varieties of these), but even with the tool it can be difficult to remove the sensor sometimes because of where it&rsquo;s located. Sometimes it&rsquo;s even difficult to disconnect and reconnect the wires for the same reason.<\/p>\n\n\n\n<p>If you&rsquo;re removing and reinstalling the same sensor, use some anti-seize compound on the threads. New sensors come with it. If you don&rsquo;t, you may not be able to remove the sensor again without destroying the threads in the converter or exhaust.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Do You Need to Access the Exhaust Oxygen Sensor?<\/h2>\n\n\n\n<p>You usually access the oxygen sensor because it&rsquo;s old or damaged, thus requiring replacement. An O2 sensor can develop issues after heavy contamination by a rich air-fuel mixture, oil blow-by, and engine coolant. The oxygen sensor can also stop working properly after exposure to high temperatures that damage its components.<\/p>\n\n\n\n<!-- Error, Advert is not available at this time due to schedule\/geolocation restrictions! -->\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>Q: Where Are the Oxygen Sensors Typically Located? A: Oxygen sensors are located in the vehicle&rsquo;s exhaust system. Most vehicles&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/where-are-oxygen-sensors-located\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":91357,"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":[52,3750],"tags":[1190],"ppma_author":[2607,2985],"class_list":{"0":"post-91356","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-diy","8":"category-exhaust-system","9":"tag-oxygen-sensor-2","10":"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>Where Are Oxygen Sensors Located? - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Where is the oxygen sensor usually located? Read this article to know where it&#039;s located and how to access 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\/where-are-oxygen-sensors-located\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Where Are Oxygen Sensors Located? - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Where is the oxygen sensor usually located? 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