{"id":72761,"date":"2022-09-08T23:59:38","date_gmt":"2022-09-09T06:59:38","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=72761"},"modified":"2023-08-03T21:31:45","modified_gmt":"2023-08-04T04:31:45","slug":"p205b-code-reductant-tank-temperature-sensor-circuit-range-performance","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p205b-code-reductant-tank-temperature-sensor-circuit-range-performance\/","title":{"rendered":"P205B Code: Reductant Tank Temperature Sensor Circuit Range \/ Performance"},"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-column_54d5dd-fc > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_54d5dd-fc > .kt-inside-inner-col,.kadence-column_54d5dd-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-column_54d5dd-fc > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_54d5dd-fc > .kt-inside-inner-col{flex-direction:column;}.kadence-column_54d5dd-fc > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_54d5dd-fc > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_54d5dd-fc{position:relative;}@media all and (max-width: 1024px){.kadence-column_54d5dd-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_54d5dd-fc > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_54d5dd-fc qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-6f7751  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-534772\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_7068d8-76, .wp-block-kadence-advancedheading.kt-adv-heading_7068d8-76[data-kb-block=\"kb-adv-heading_7068d8-76\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_7068d8-76 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_7068d8-76[data-kb-block=\"kb-adv-heading_7068d8-76\"] 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-heading_7068d8-76 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_7068d8-76[data-kb-block=\"kb-adv-heading_7068d8-76\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_7068d8-76 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_7068d8-76\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The P205B code stands for &ldquo;Reductant Tank Temperature Sensor Circuit Range\/Performance&rdquo;, which means the power control module (PCM) didn&rsquo;t get the right response from the reductant tank temperature sensor.<\/li><li>Some of the common causes of the P205B code include a bad reductant tank temperature sensor, wiring issues, and a bad selective catalytic reduction (SCR) controller.<\/li><li>An illuminated check engine light, triggered diesel exhaust fluid warning light, and the vehicle being stuck in limp mode are some of the common symptoms related to the P205B code.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The reductant tank temperature sensor measures the amount and temperature of the reductant in the diesel exhaust aftertreatment system. It provides accurate readings for the <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"powertrain control module\">powertrain control module<\/a> (PCM). The PCM uses the data as a reference for any adjustments it has to make to various engine and exhaust processes.<\/p>\n\n\n\n<p>If the PCM receives an improbable voltage signal that is higher or lower than the programmed range of the reductant tank temperature sensor, its diagnostics will log a P205B code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P205B 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) P205B indicates &ldquo;Reductant Tank Temperature Sensor Circuit Range\/Performance.&rdquo;<\/p>\n\n\n\n<p>Modern diesel-engine vehicles rely on their diesel exhaust aftertreatment system to keep their emissions within safe and legal levels. The last stage of the treatment process is called catalytic reduction. It adds <a href=\"https:\/\/www.carparts.com\/diesel-exhaust-fluid\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"diesel exhaust fluid\">diesel exhaust fluid<\/a> (DEF), which is also known as reductant, to the exhaust stream.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-1024x681.jpg\" alt=\"car old exhaust system exposed\" class=\"wp-image-72762\" width=\"1024\" height=\"681\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-1024x681.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-768x511.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-1536x1022.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-old-exhaust-system-exposed.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Modern diesel-engine vehicles rely on their diesel exhaust aftertreatment system to keep their emissions within safe and legal levels.<\/figcaption><\/figure>\n\n\n\n<p>Reductant breaks down the remaining particles of toxic exhaust into safer substances. It can only work when the temperature in the exhaust system is sufficiently hot. The reductant tank temperature sensor takes the level and temperature of the DEF.<\/p>\n\n\n\n<p>The PCM regularly checks the reductant tank temperature sensor. If the computer doesn&rsquo;t get the right response, it will set the generic powertrain code P205B.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P205B can differ depending on 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 P205B Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Bad reductant tank temperature sensor<\/li><li>Wiring problems in the reductant tank temperature sensor system<\/li><li>Bad selective catalytic reduction (SCR) controller<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty PCM\">Faulty PCM<\/a><\/li><li>SCR or PCM programming error<\/li><\/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 P205B Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><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><li>Illuminated diesel exhaust fluid warning light<\/li><li>Vehicle derated or stuck in &ldquo;limp&rdquo; mode<\/li><li>Vehicle can&rsquo;t restart after driving with the warning lights illuminated<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P205B Code<\/h2>\n\n\n\n<p>The P205B code is a generic powertrain code that various makes and models can log. However, this does not mean that there is a one-size-fits-all solution to identify its underlying problem.<\/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. Otherwise, you can go ahead and diagnose the issue yourself. To help you get started, here is a video that can give you an idea of what the process might involve:<\/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=\"3.0t TDI AdBlue Heater Failure ~ P205B Check Engine Light\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/VDygorRJTqs?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 P205B Code<\/h2>\n\n\n\n<p>Attempting to fix a P205B code can become a challenging task if you don&rsquo;t have the right tools and know-how to test the reductant tank temperature sensor. In most cases, it&rsquo;s best to leave the job to professionals.<\/p>\n\n\n\n<p>But if you have the right tools and knowledge to test and replace your vehicle&rsquo;s reductant tank temperature sensor, you can address the issue on your own. Make sure you 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 an online repair database\">repair manual or an online repair database<\/a> that&rsquo;s specific to your vehicle before you get started.<\/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>The reductant tank temperature sensor measures the amount and temperature of the reductant in the diesel exhaust aftertreatment system. It&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p205b-code-reductant-tank-temperature-sensor-circuit-range-performance\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":72774,"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":[3540,1323],"ppma_author":[2607,2855],"class_list":{"0":"post-72761","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-diesel-exhaust-fluid","9":"tag-engine-control-module-2","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P205B Code: Reductant Tank Temperature Sensor Circuit Range \/ Performance - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P205B code means, the possible causes, and the common symptoms associated with it. Find out the proper way to resolve the issue. 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\/p205b-code-reductant-tank-temperature-sensor-circuit-range-performance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P205B Code: Reductant Tank Temperature Sensor Circuit Range \/ Performance - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P205B code means, the possible causes, and the common symptoms associated with it. Find out the proper way to resolve the issue. 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