{"id":73213,"date":"2022-10-09T20:38:36","date_gmt":"2022-10-10T03:38:36","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=73213"},"modified":"2023-08-09T00:54:13","modified_gmt":"2023-08-09T07:54:13","slug":"u0109-code-lost-communication-with-fuel-pump-control-module","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/u0109-code-lost-communication-with-fuel-pump-control-module\/","title":{"rendered":"U0109 Code: Lost Communication with Fuel Pump Control Module"},"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_a25862-be > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_a25862-be > .kt-inside-inner-col,.kadence-column_a25862-be > .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_a25862-be > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_a25862-be > .kt-inside-inner-col{flex-direction:column;}.kadence-column_a25862-be > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_a25862-be > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_a25862-be{position:relative;}@media all and (max-width: 1024px){.kadence-column_a25862-be > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_a25862-be > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_a25862-be qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-5d2014  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-a4a177\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_954ac3-3b, .wp-block-kadence-advancedheading.kt-adv-heading_954ac3-3b[data-kb-block=\"kb-adv-heading_954ac3-3b\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_954ac3-3b mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_954ac3-3b[data-kb-block=\"kb-adv-heading_954ac3-3b\"] 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_954ac3-3b img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_954ac3-3b[data-kb-block=\"kb-adv-heading_954ac3-3b\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_954ac3-3b summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_954ac3-3b\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The diagnostic trouble code (DTC) U0109 stands for &ldquo;Lost Communication with Fuel Pump Control Module.&rdquo;<\/li><li>Your vehicle&rsquo;s powertrain control module (PCM) will log this code when the fuel pump control module develops a problem.<\/li><li>The common causes of the U0109 code include a bad fuel pump control module, wiring issues, and data network issues.<\/li><li>U0109 code symptoms are an illuminated check engine light and the engine cranking but failing to start.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>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) operates the <a href=\"https:\/\/www.carparts.com\/fuel-injector\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injectors\">fuel injectors<\/a> in electronic fuel-injection systems by using the signals from the ignition switch and <a href=\"https:\/\/www.carparts.com\/rpm-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"RPM sensor\">RPM sensor<\/a>. On vehicles with a returnless fuel injection system, the PCM typically communicates with the fuel pump control module (FPCM), which, in turn, controls the in-tank fuel pump.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the U0109 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) U0109 stands for &ldquo;Lost Communication with Fuel Pump Control Module.&rdquo;<\/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\/fuel-pump-with-fuel-sending-unit-isolated-1024x602.jpg\" alt=\"fuel pump with fuel sending unit isolated\" class=\"wp-image-74098\" width=\"1024\" height=\"602\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-with-fuel-sending-unit-isolated-1024x602.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-with-fuel-sending-unit-isolated-300x176.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-with-fuel-sending-unit-isolated-768x452.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-with-fuel-sending-unit-isolated-1536x904.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-with-fuel-sending-unit-isolated-150x88.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-with-fuel-sending-unit-isolated.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The fuel pump uses high pressure to deliver fuel from the gas tank to the fuel injectors.<\/figcaption><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/fuel-pump\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel pump\">fuel pump<\/a> uses high pressure to deliver fuel from the <a href=\"https:\/\/www.carparts.com\/fuel-tank\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"gas tank\">gas tank<\/a> to the fuel injectors. The fuel pump is also a part of the sending unit assembly that sends an electric signal to the <a href=\"https:\/\/www.carparts.com\/fuel-gauge\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel gauge\">fuel gauge<\/a>. To ensure that the fuel pump is working as it should, the PCM relies on the information sent by various sensors and modules, which includes the fuel pump control module. If a problem develops in the FPCM, on-board diagnostics (OBD) will log a U0109 code.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code U0109 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 U0109 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty fuel pump control module<\/li><li>Circuit problems, such as a damaged wire or poor connection<\/li><li>Data network problems<\/li><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 powertrain control module\">An issue with the powertrain control module<\/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 U0109 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\/my-car-wont-start-what-should-i-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Engine cranks but won&rsquo;t start\">Engine cranks but won&rsquo;t start<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the U0109 Code<\/h2>\n\n\n\n<p>Although U0109 is considered a generic diagnostic trouble code (DTC), the steps for its diagnosis and repair can vary depending on vehicle specifications. If you&rsquo;re not familiar with the process of diagnosing trouble codes, it might be best to bring your vehicle to the nearest auto repair shop and have a certified mechanic check your vehicle for you.<\/p>\n\n\n\n<p>But if you&rsquo;ve had your fair share of checking your vehicle for trouble codes, then you can go ahead and do it yourself.<\/p>\n\n\n\n<p>To help you out, here&rsquo;s a video that shows 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=\"2011 GM Truck No Start Again...Comeback U0109\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/SCqFOdlBECg?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 U0109 Code<\/h2>\n\n\n\n<p>Attempting to fix a U0109 code can be tricky without the right tools and technical knowledge. Working on your vehicle without the necessary auto repair skills might lead to more problems down the road. So if you&rsquo;re not confident with your DIY skills yet, it&rsquo;s best to have a trained professional do the repairs for you instead.<\/p>\n\n\n\n<p>But if you&rsquo;re someone who knows their way around resolving trouble codes, make sure to have the <a href=\"https:\/\/www.carparts.com\/blog\/why-you-should-always-consult-a-repair-manual\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"right repair manuals\">right repair manuals<\/a> before proceeding. Keep in mind that there&rsquo;s no such thing as a magic bullet that will work for all vehicles. So before you start, you might want to check out guides like those from Chilton or an ALLDATA subscription 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>The powertrain control module (PCM) operates the fuel injectors in electronic fuel-injection systems by using the signals from the ignition&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/u0109-code-lost-communication-with-fuel-pump-control-module\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":74099,"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":[1323,1211,1185,1197,1198,3573],"ppma_author":[2607,2855],"class_list":{"0":"post-73213","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-gauge","10":"tag-fuel-injector-2","11":"tag-fuel-pump-2","12":"tag-fuel-tank-2","13":"tag-rpm-sensor","14":"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>U0109 Code: Lost Communication with Fuel Pump Control Module - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out what a U0109 code means as well as the most common causes and symptoms associated with 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\/u0109-code-lost-communication-with-fuel-pump-control-module\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"U0109 Code: Lost Communication with Fuel Pump Control Module - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out what a U0109 code means as well as the most common causes and symptoms associated with this trouble code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/u0109-code-lost-communication-with-fuel-pump-control-module\/\" \/>\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=\"2022-10-10T03:38:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-09T07:54:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/09\/fuel-pump-repair-by-skilled-mechanic.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1331\" \/>\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\\\/u0109-code-lost-communication-with-fuel-pump-control-module\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/u0109-code-lost-communication-with-fuel-pump-control-module\\\/\"},\"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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