{"id":77034,"date":"2022-10-27T19:35:42","date_gmt":"2022-10-28T02:35:42","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=77034"},"modified":"2024-08-13T01:52:31","modified_gmt":"2024-08-13T08:52:31","slug":"p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high\/","title":{"rendered":"P040D Code: Exhaust Gas Recirculation Temperature Sensor &#8220;A&#8221; Circuit High"},"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-column77034_38b1a1-ed > .kt-inside-inner-col,.kadence-column77034_38b1a1-ed > .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-column77034_38b1a1-ed > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column77034_38b1a1-ed > .kt-inside-inner-col{flex-direction:column;}.kadence-column77034_38b1a1-ed > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column77034_38b1a1-ed > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column77034_38b1a1-ed{position:relative;}@media all and (max-width: 1024px){.kadence-column77034_38b1a1-ed > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column77034_38b1a1-ed > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column77034_38b1a1-ed inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-f462a3  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-1f8c94\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading77034_7f98a0-ad, .wp-block-kadence-advancedheading.kt-adv-heading77034_7f98a0-ad[data-kb-block=\"kb-adv-heading77034_7f98a0-ad\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading77034_7f98a0-ad mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading77034_7f98a0-ad[data-kb-block=\"kb-adv-heading77034_7f98a0-ad\"] 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-heading77034_7f98a0-ad img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading77034_7f98a0-ad[data-kb-block=\"kb-adv-heading77034_7f98a0-ad\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading77034_7f98a0-ad summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading77034_7f98a0-ad\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The diagnostic trouble code (DTC) P040D means &ldquo;Exhaust Gas Recirculation Temperature Sensor &lsquo;A&rsquo; Circuit High.&rdquo;<\/li>\n\n\n\n<li>The PCM compares the EGR temperature sensor &rdquo;A&rdquo; readings with values programmed into its memory. If the voltage is too high, it will set the generic code P040D.<\/li>\n\n\n\n<li>The common causes of the P040D code include a damaged or faulty EGR temperature sensor, circuit issues, or a PCM issue.<\/li>\n\n\n\n<li>The common symptoms of the P040D code are an illuminated check engine light or engine performance issues.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Exhaust gas recirculation (EGR) temperature sensors monitor the temperature of the gasses entering and exiting the <a href=\"https:\/\/www.carparts.com\/egr-cooler\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"EGR cooler\">EGR cooler<\/a>. They send their readings on exhaust gas temperature to the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"engine control module\">engine control module<\/a> (ECM) or powertrain control module (PCM).<\/p>\n\n\n\n<p>If the PCM receives an impossibly high voltage signal from the <a href=\"https:\/\/www.carparts.com\/egr-temperature-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"EGR temperature sensor\">EGR temperature sensor<\/a> &ldquo;A,&rdquo; its diagnostics will log a P040D code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P040D Code Mean?<\/h2>\n\n\n\n<p>The <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) P040D indicates &ldquo;Exhaust Gas Recirculation Temperature Sensor &lsquo;A&rsquo; Circuit High.&rdquo;<\/p>\n\n\n\n<p>The EGR redirects gasses going through the exhaust system back to the engine. The recirculated exhaust mixes with fresh air and undergoes combustion once more.<\/p>\n\n\n\n<p>The EGR directs the gasses into the EGR cooler, which lowers the exhaust gas temperature.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"602\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature-1024x602.jpg\" alt=\"egr temperature sensors monitor gas temperature\" class=\"wp-image-77035\" style=\"width:1024px;height:602px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/egr-temperature-sensors-monitor-gas-temperature.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The EGR temperature sensor is a resistor-type device that measures the temperature of the exhaust gasses before and after passing through the EGR cooler.<\/figcaption><\/figure>\n\n\n\n<p>The EGR temperature sensor is a resistor-type device that measures the temperature of the exhaust gasses before and after passing through the EGR cooler. Then, it converts the reading into a voltage signal and sends it to the PCM. Using the reading, the controller can change the amount of exhaust going to the engine by adjusting the <a href=\"https:\/\/www.carparts.com\/egr-valve\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"EGR valve\">EGR valve<\/a>.<\/p>\n\n\n\n<p>The PCM compares the EGR temperature sensor &rdquo;A&rdquo; readings with a range of values programmed into its memory. If the voltage is too high, it will set the generic code P040D.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P040D can differ according to the vehicle manufacturer. Check 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 P040D Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Damaged or faulty EGR temperature sensor<\/li>\n\n\n\n<li>Circuit issues, such as a damaged wire or poor connection<\/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=\"An issue with the PCM\">An issue with the PCM<\/a>, such as software in need of an update<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P040D 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=\"Illuminated check engine light\">Illuminated check engine light<\/a><\/li>\n\n\n\n<li>Vehicle lacks power or has other engine performance problems<\/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\">How to Diagnose the P040D Code<\/h2>\n\n\n\n<p>The P040D code is a generic code that applies to all makes and models with an on-board diagnostics system. While various vehicles can log the code, the specifics can change between cases, so there is no single solution for it.<\/p>\n\n\n\n<p>If you&rsquo;re not confident about conducting diagnostic tests on your vehicle, it&rsquo;s a good idea to bring it to a professional mechanic who you trust. Otherwise, you can go ahead and diagnose the issue yourself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P040D Code<\/h2>\n\n\n\n<p>To fix a P040D code, you will need the appropriate tools and relevant knowledge to replace the faulty EGR temperature sensor &ldquo;A.&rdquo; It&rsquo;s highly recommended to leave the job to experienced mechanics.<\/p>\n\n\n\n<p>For DIYers with advanced technical knowledge and hands-on experience who prefer to test and replace their vehicle&rsquo;s EGR temperature sensors on their own, it&rsquo;s a good idea to consult a <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"repair manual or refer to an online repair database\">repair manual or refer to an online repair database<\/a>. These resources have vehicle-specific repair information.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Delivering Your New EGR Temperature Sensor to Your Home<\/h2>\n\n\n\n<p>We recommend leaving your vehicle in the garage until you can replace its bad EGR temperature sensor. Driving with a faulty part might damage the engine, creating more problems. Fortunately, you don&rsquo;t have to drive to a shop to get a replacement EGR temperature sensor because CarParts.com delivers to your doorstep.<\/p>\n\n\n\n<p>When you purchase a product from CarParts.com, our nearest warehouse processes your order and ships your new part to your home. If you live anywhere in the continental US and order by noon ET, your replacement EGR temperature sensor will reach you within several business days. We also make finding an EGR sensor that fits your car easy&ndash;simply enter your vehicle&rsquo;s details into our website&rsquo;s integrated vehicle selector. Got any questions about our products? Our capable customer service team is available 24\/7 to help you.<\/p>\n\n\n\n<p>What are you waiting for? Browse our wide selection of <a href=\"https:\/\/www.carparts.com\/egr-temperature-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"EGR temperature sensors\">EGR temperature sensors<\/a> at CarParts.com today!<\/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>Exhaust gas recirculation (EGR) temperature sensors monitor the temperature of the gasses entering and exiting the EGR cooler. They send&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":77036,"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":[1846,3542,1232,1323],"ppma_author":[2607,2855],"class_list":{"0":"post-77034","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-egr-cooler","9":"tag-egr-temperature-sensor","10":"tag-egr-valve-2","11":"tag-engine-control-module-2","12":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P040D Code: Exhaust Gas Recirculation Temperature Sensor &quot;A&quot; Circuit High - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P040D code means, its possible causes, and the common symptoms associated with this 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\/p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P040D Code: Exhaust Gas Recirculation Temperature Sensor &quot;A&quot; Circuit High - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P040D code means, its possible causes, and the common symptoms associated with this code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high\/\" \/>\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:published_time\" content=\"2022-10-28T02:35:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-08-13T08:52:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/p040d-code-egr-temperature-sensor-issue.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1333\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:site\" content=\"@carpartscom\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p040d-code-exhaust-gas-recirculation-temperature-sensor-a-circuit-high\\\/\"},\"author\":[{\"@type\":\"Person\",\"$id\":\"4\",\"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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