{"id":73566,"date":"2022-10-09T23:16:37","date_gmt":"2022-10-10T06:16:37","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=73566"},"modified":"2024-08-05T23:39:50","modified_gmt":"2024-08-06T06:39:50","slug":"p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector\/","title":{"rendered":"P0251 Code: Injection Pump Fuel Metering Control &#8220;A&#8221; (Cam\/Rotor\/Injector)"},"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-column73566_4479bb-a7 > .kt-inside-inner-col,.kadence-column73566_4479bb-a7 > .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-column73566_4479bb-a7 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column73566_4479bb-a7 > .kt-inside-inner-col{flex-direction:column;}.kadence-column73566_4479bb-a7 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column73566_4479bb-a7 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column73566_4479bb-a7{position:relative;}@media all and (max-width: 1024px){.kadence-column73566_4479bb-a7 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column73566_4479bb-a7 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column73566_4479bb-a7 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-bf73f3  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-a2605a\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading73566_d5352c-e2, .wp-block-kadence-advancedheading.kt-adv-heading73566_d5352c-e2[data-kb-block=\"kb-adv-heading73566_d5352c-e2\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading73566_d5352c-e2 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading73566_d5352c-e2[data-kb-block=\"kb-adv-heading73566_d5352c-e2\"] 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-heading73566_d5352c-e2 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading73566_d5352c-e2[data-kb-block=\"kb-adv-heading73566_d5352c-e2\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading73566_d5352c-e2 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading73566_d5352c-e2\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If your vehicle logs a P0251 trouble code, it means that the PCM has detected an abnormality in the engine&rsquo;s operating conditions based on the readings from the fuel rail pressure sensor.<\/li>\n\n\n\n<li>A failed fuel control actuator, fuel rail pressure sensor circuit issues, and a faulty fuel pump are common issues that can trigger a P0251 code.<\/li>\n\n\n\n<li>Decreased fuel economy and poor acceleration are common symptoms of the P0251 code.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The fuel injection system is controlled by 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) which controls the operation of fuel injectors and other components based on information from various sensors.<\/p>\n\n\n\n<p>P0251 is one of the several trouble codes related to a fault in this system. Know more about it through this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0251 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) P0251 stands for &ldquo;Injection Pump Fuel Metering Control &ldquo;A&rdquo; (CAM\/Rotor\/Injector).&rdquo; This code typically applies to vehicles with diesel engines.<\/p>\n\n\n\n<p>The injection pump fuel metering control circuit &ldquo;A&rdquo; is usually located inside or on the side of the <a href=\"https:\/\/www.carparts.com\/fuel-injection-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"injection pump\">injection pump<\/a>. It&rsquo;s usually equipped with a <a href=\"https:\/\/www.carparts.com\/fuel-rail-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel rail pressure (FRP) sensor\">fuel rail pressure (FRP) sensor<\/a> and a fuel control actuator (FCA).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"723\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine-1024x723.jpg\" alt=\"fuel rail pressure sensor monitors fuel delivered to engine\" class=\"wp-image-74188\" style=\"width:1024px;height:723px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine-1024x723.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine-300x212.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine-768x542.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine-1536x1084.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine-150x106.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-rail-pressure-sensor-monitors-fuel-delivered-to-engine.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">The FRP sensor monitors the amount of fuel delivered to the engine by the fuel FCA to the high-pressure pump and sends this data to the PCM using voltage signals.<\/figcaption><\/figure>\n\n\n\n<p>The FRP sensor monitors the amount of fuel delivered to the engine by the fuel FCA to the high-pressure pump and sends this data to the PCM using voltage signals. The PCM then uses this data to analyze the amount of fuel it&rsquo;ll inject into the engine based on engine operating conditions.<\/p>\n\n\n\n<p>Code P0251 is set once the PCM detects an input signal that doesn&rsquo;t match normal engine operating conditions. This &ldquo;normal&rdquo; condition is based on what&rsquo;s set in the PCM&rsquo;s memory.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P0251 might 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 P0251 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Failed fuel control actuator<\/li>\n\n\n\n<li>FRP sensor circuit issues (short\/open\/grounded)<\/li>\n\n\n\n<li>Malfunctioning FRP sensor<\/li>\n\n\n\n<li><a href=\"https:\/\/www.carparts.com\/blog\/how-to-diagnose-a-faulty-fuel-pump\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Faulty fuel pump\">Faulty fuel pump<\/a><\/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<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 P0251 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>Decreased fuel economy<\/li>\n\n\n\n<li>Engine performance problems, such as a lack of power and <a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"stalling\">stalling<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0251 Code<\/h2>\n\n\n\n<p>While DTC P0251 is a generic powertrain code, the steps for diagnosing this code will vary across different makes and models. If you don&rsquo;t have the tools and technical know-how to diagnose the problem, it might be best to have a professional identify the problem for you instead. If you&rsquo;re an experienced automotive DIYer, then you can go ahead and do it yourself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P0251 Code<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-1024x682.jpg\" alt=\"car owner explains issue to male mechanic\" class=\"wp-image-74194\" style=\"width:1024px;height:682px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/car-owner-explains-issue-to-male-mechanic.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">We recommend bringing your vehicle to the nearest auto repair shop and having a certified mechanic fix the issue.<\/figcaption><\/figure>\n\n\n\n<p>Trying to fix any trouble code can be tricky, especially if you don&rsquo;t have the right tools and technical knowledge. We recommend bringing your vehicle to the nearest auto repair shop and having a certified mechanic fix the issue.<\/p>\n\n\n\n<p>But if you have the tools and experience for it, make sure to have the right tools before starting. Guides like those from Chilton can help you fix the issue correctly. An ALLDATA subscription containing vehicle-specific repair information will also be of great help.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Get a Long-Lasting Fuel Rail Pressure Sensor<\/h2>\n\n\n\n<p>Is the fuel rail pressure sensor responsible for the P0251 code set by the PCM? Investing in a reliable replacement sensor can prevent recurrences of the trouble code and save you on future repair costs. Fortunately, CarParts.com can help you find a dependable fuel rail pressure sensor quickly and easily.<\/p>\n\n\n\n<p>CarParts.com is your one-stop shop for high-grade replacement parts for various makes and models. We only source our products from trustworthy manufacturers, ensuring the new parts perform as promised throughout their service life. Quickly find the right part by plugging your vehicle&rsquo;s details into our website&rsquo;s built-in vehicle selector. You can browse our extensive catalog of products for the new sensor that meets your application and budget. You can expect your new fuel rail pressure sensor to reach your doorstep in only several business days if you live in the continental US and order before noon ET.<\/p>\n\n\n\n<p>So, what are you waiting for? Check out our selection of competitively priced <a href=\"https:\/\/www.carparts.com\/fuel-rail-pressure-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel rail pressure sensors\">fuel rail pressure sensors<\/a> at CarParts.com and enjoy great savings 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>The fuel injection system is controlled by the powertrain control module (PCM) which controls the operation of fuel injectors and&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":74189,"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":[1323,1197,2178],"ppma_author":[2607,2855],"class_list":{"0":"post-73566","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-engine-control-module-2","9":"tag-fuel-pump-2","10":"tag-fuel-rail-pressure-sensor","11":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0251 Code: Injection Pump Fuel Metering Control &quot;A&quot; (Cam\/Rotor\/Injector) - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P0251 code means, its possible causes, and the common symptoms associated with this diagnostic 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\/p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0251 Code: Injection Pump Fuel Metering Control &quot;A&quot; (Cam\/Rotor\/Injector) - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P0251 code means, its possible causes, and the common symptoms associated with this diagnostic trouble code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector\/\" \/>\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=\"2022-10-10T06:16:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-08-06T06:39:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/p0251-code-detected-by-a-male-mechanic-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1365\" \/>\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\\\/p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0251-code-injection-pump-fuel-metering-control-a-cam-rotor-injector\\\/\"},\"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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