{"id":75523,"date":"2022-10-16T15:53:32","date_gmt":"2022-10-16T22:53:32","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=75523"},"modified":"2023-09-04T16:44:01","modified_gmt":"2023-09-04T23:44:01","slug":"p204f-code-reductant-system-performance-bank-1","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p204f-code-reductant-system-performance-bank-1\/","title":{"rendered":"P204F Code: Reductant System Performance Bank 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\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_fc8047-8a > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_fc8047-8a > .kt-inside-inner-col,.kadence-column_fc8047-8a > .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_fc8047-8a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_fc8047-8a > .kt-inside-inner-col{flex-direction:column;}.kadence-column_fc8047-8a > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_fc8047-8a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_fc8047-8a{position:relative;}@media all and (max-width: 1024px){.kadence-column_fc8047-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_fc8047-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_fc8047-8a qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-88def6  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-2ec203\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_7baa23-1c, .wp-block-kadence-advancedheading.kt-adv-heading_7baa23-1c[data-kb-block=\"kb-adv-heading_7baa23-1c\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_7baa23-1c mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_7baa23-1c[data-kb-block=\"kb-adv-heading_7baa23-1c\"] 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_7baa23-1c img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_7baa23-1c[data-kb-block=\"kb-adv-heading_7baa23-1c\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_7baa23-1c summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_7baa23-1c\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code P204F stands for &ldquo;Reductant System Performance Bank 1.&rdquo;<\/li><li>The code is triggered once the powertrain control module (PCM) detects an issue in the reductant part of the SCR system. Bank 1 refers to the bank of the engine where cylinder #1 is located.<\/li><li>The common causes of a P204F code include a defective reductant pressure sensor, a bad reductant system injector, contaminated diesel exhaust fluid (DEF), and a failed SCR controller. Low DEF and circuit issues may also cause the error code to be set.<\/li><li>Your vehicle can be stuck in a derated state once the code is logged. The DEF system warning light will also illuminate along with the check engine light.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>Clean-burning diesel engines today require more than just particulate filtration. Thankfully, the selective catalyst reduction (SCR) system was invented to help reduce harmful exhaust emissions. But like any other system inside your vehicle, the components in the SCR can malfunction over time. P204F is a generic trouble code related to this. Know more by reading this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P204F 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> P204F stands for &ldquo;Reductant System Performance Bank 1.&rdquo; The code is triggered once 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) detects an issue in the reductant part of the SCR system. Bank 1 refers to the bank of the engine where cylinder #1 is located.<\/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\/10\/man-pouring-diesel-exhaust-fluid-1024x683.jpg\" alt=\"man pouring diesel exhaust fluid\" class=\"wp-image-75813\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-1024x683.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-pouring-diesel-exhaust-fluid-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Precise DEF injection is needed to further reduce the amount of NOx emissions emitted from the tailpipe.<\/figcaption><\/figure>\n\n\n\n<p>A reductant injection valve or solenoid is usually used to inject a reductant compound or a <a href=\"https:\/\/www.carparts.com\/diesel-exhaust-fluid\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"diesel exhaust fluid\">diesel exhaust fluid<\/a> (DEF) into the exhaust, NOx trap, and\/or <a href=\"https:\/\/www.carparts.com\/catalytic-converter\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"catalytic converter\">catalytic converter<\/a>. The PCM or a stand-alone controller monitors and controls the entire SCR system. Precise DEF injection is needed to further reduce the amount of NOx emissions emitted from the tailpipe.<\/p>\n\n\n\n<p>When needed, the reductant\/regeneration supply pump is used to pressurize the DEF in the liquid reductant system. The PCM monitors supply pump voltage for consistent fluctuation and load percentage. The PCM also checks one or more pressure sensors in the reductant supply system to see if there is a leak.<\/p>\n\n\n\n<p>If the PCM detects that the reductant system for engine bank one is not functioning properly, a code P204F is stored and the check engine light will be illuminated.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P204F 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 P204F Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Defective reductant pressure sensor<\/li><li>Faulty reductant system injector<\/li><li>An issue with the reductant pump or lines<\/li><li>Incorrect or contaminated&nbsp; DEF<\/li><li>Low DEF<\/li><li>Open or shorted circuits in the reductant system<\/li><li>Bad SCR controller\/<a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM or programming error\">PCM or programming error<\/a><\/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 P204F 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><a href=\"https:\/\/www.carparts.com\/blog\/what-causes-your-def-warning-light-to-switch-on\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"DEF system warning on the dash\">DEF system warning on the dash<\/a><\/li><li>&nbsp;Other SCR-related codes<\/li><li>Vehicle stuck in a derated state<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P204F Code<\/h2>\n\n\n\n<p>DTC P204F is a generic powertrain code that can be logged on many modern vehicles on the market.&nbsp; However, that doesn&rsquo;t mean that the diagnostic and repair procedures for this trouble code.<\/p>\n\n\n\n<p>Diagnosing a P204F code can be tricky. You&rsquo;ll need adequate knowledge on the reductant system to diagnose the issue correctly. Luckily, you can always have a certified mechanic do the job for you.<\/p>\n\n\n\n<p>Here is a video of what the diagnostic procedure for this code 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=\"Ford Ranger 3.2 - P204D P204F - AdBlue Pressure Sensor - What to Do?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/dHlN3887Ytg?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 P204f Code<\/h2>\n\n\n\n<p>Attempting to fix a DTC P204F code isn&rsquo;t easy. If you don&rsquo;t have enough technical know-how to get the job done, you might just end up causing more issues. If you&rsquo;re not sure about anything, it&rsquo;s best to have the problem fixed by a trained professional to ensure that all steps and protocols are followed properly.<\/p>\n\n\n\n<p>But if you think you can handle the problem on your own, make sure you have the right information before proceeding. Remember that there is no one-size-fits-all solution that works on all makes and models. Before you start, you might want to look into Chilton guides or an ALLDATA membership to get vehicle-specific repair information.<\/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>Clean-burning diesel engines today require more than just particulate filtration. Thankfully, the selective catalyst reduction (SCR) system was invented to&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p204f-code-reductant-system-performance-bank-1\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":75814,"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":[1189,3540,1323],"ppma_author":[2607,2855],"class_list":{"0":"post-75523","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-catalytic-converter-2","9":"tag-diesel-exhaust-fluid","10":"tag-engine-control-module-2","11":"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>P204F Code: Reductant System Performance Bank 1 - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Know more about the P204F code, what it means, and the common triggers and symptoms related to this trouble 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\/p204f-code-reductant-system-performance-bank-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P204F Code: Reductant System Performance Bank 1 - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Know more about the P204F code, what it means, and the common triggers and symptoms related to this trouble code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p204f-code-reductant-system-performance-bank-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:published_time\" content=\"2022-10-16T22:53:32+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-04T23:44:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/man-checking-car-def-cap-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1366\" \/>\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=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p204f-code-reductant-system-performance-bank-1\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p204f-code-reductant-system-performance-bank-1\\\/\"},\"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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