{"id":71769,"date":"2022-09-01T02:58:33","date_gmt":"2022-09-01T09:58:33","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=71769"},"modified":"2023-09-04T18:28:52","modified_gmt":"2023-09-05T01:28:52","slug":"p2146-code-fuel-injector-group-a-supply-voltage-circuit-open","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2146-code-fuel-injector-group-a-supply-voltage-circuit-open\/","title":{"rendered":"P2146 Code: Fuel Injector Group &#8220;A&#8221; Supply Voltage Circuit \/ Open"},"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_f33290-f3 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_f33290-f3 > .kt-inside-inner-col,.kadence-column_f33290-f3 > .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_f33290-f3 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_f33290-f3 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_f33290-f3 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_f33290-f3 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_f33290-f3{position:relative;}@media all and (max-width: 1024px){.kadence-column_f33290-f3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_f33290-f3 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_f33290-f3 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-e8864a  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-28d87d\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_aeff52-69, .wp-block-kadence-advancedheading.kt-adv-heading_aeff52-69[data-kb-block=\"kb-adv-heading_aeff52-69\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_aeff52-69 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_aeff52-69[data-kb-block=\"kb-adv-heading_aeff52-69\"] 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_aeff52-69 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_aeff52-69[data-kb-block=\"kb-adv-heading_aeff52-69\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_aeff52-69 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_aeff52-69\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>The diagnostic trouble code (DTC) P2146 indicates &ldquo;Fuel Injector Group &lsquo;A&rsquo; Supply Voltage Circuit \/ Open.&rdquo;<\/li><li>Your vehicle&rsquo;s powertrain control module (PCM) will set this code if it detects an open circuit or an issue with the supply voltage circuit of the group A injectors.<\/li><li>Issues like a bad fuel injector, a faulty PCM, and fuel injector wiring problems can trigger a P2146 code.<\/li><li>Common symptoms of the P2146 code are an illuminated check engine light, the engine running roughly, and insufficient engine power.<\/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\/fuel-injector\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"fuel injectors\">fuel injectors<\/a> control how much pressurized fuel goes into the engine every cycle. Each cylinder typically has one injector that feeds it fuel, and 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) assigns them into groups of two for convenient monitoring and control.<\/p>\n\n\n\n<p>If the PCM detects that more than one of the fuel injectors in group A is not working properly, its diagnostics will log a P2146 code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2146 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) P2146 stands for &ldquo;Fuel Injector Group &ldquo;A&rdquo; Supply Voltage Circuit\/Open.&rdquo;<\/p>\n\n\n\n<p>Group &ldquo;A&rdquo; refers to a particular injector group in the engine. Check a repair manual or repair database to determine which group this refers to.<\/p>\n\n\n\n<p>The PCM controls the fuel injectors electronically. During each intake stroke in the engine, the computer usually provides a ground to the appropriate injector.<\/p>\n\n\n\n<p>The signal prompts the injector to spray a certain amount of fuel into the cylinder to mix with air and burn to produce power. The heavier the load placed on the engine, the more fuel is needed.<\/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\/08\/technician-inspects-malfunctioning-fuel-injector-1024x682.jpg\" alt=\"technician inspects malfunctioning fuel injector\" class=\"wp-image-71819\" width=\"1024\" height=\"682\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector-1024x682.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector-768x512.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector-1536x1024.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/technician-inspects-malfunctioning-fuel-injector.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The fuel injectors control how much pressurized fuel goes into the engine every cycle.<\/figcaption><\/figure>\n\n\n\n<p>Because modern fuel injectors are electronic devices, a steady and sufficient supply voltage is critical for their operation. The voltage is drawn from a power source that is used to run a device&ndash;in this case, the injectors.<\/p>\n\n\n\n<p>The PCM regularly checks the fuel injectors and their wiring. If the computer detects an open circuit or a problem with the supply voltage circuit of the group A injectors, it will set the powertrain code P2146.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P2146 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 P2146 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.carparts.com\/blog\/the-top-6-signs-of-bad-fuel-injectors\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Bad fuel injector\">Bad fuel injector<\/a><\/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>Problems with the fuel injector wiring<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2146 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>Engine runs roughly and lacks power<\/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\">How to Diagnose the P2146 Code<\/h2>\n\n\n\n<p>The P2146 code is a generic powertrain code that various makes and models can log. However, this does not mean 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 are some videos 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=\"2007 Dodge Ram 2500 Cummins 5.9 24v P2146 troubleshooting part 1\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/TGfzvkYU-A0?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<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=\"2007 Dodge Ram 2500 Cummins 5.9 24v P2146 troubleshooting part 2\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/QgRpSv3O-Sw?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 P2146 Code<\/h2>\n\n\n\n<p>Attempting to fix a P2146 code can become a frustrating task if you don&rsquo;t have the right tools and know-how to do it. In most cases, it&rsquo;s best to leave the job to professionals.<\/p>\n\n\n\n<p>But if you have the tools and technical knowledge to address the issue, you can address the P2146 code on your own. Just make sure 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 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 fuel injectors control how much pressurized fuel goes into the engine every cycle. Each cylinder typically has one injector&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2146-code-fuel-injector-group-a-supply-voltage-circuit-open\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":71818,"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":[1323,1185],"ppma_author":[2607,2855],"class_list":{"0":"post-71769","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-injector-2","10":"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>P2146 Code: Fuel Injector Group &quot;A&quot; Supply Voltage Circuit \/ Open - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Find out the meaning of code P2146 and its common causes and symptoms. Learn what to do if you get this code from your OBD scanner.\" \/>\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\/p2146-code-fuel-injector-group-a-supply-voltage-circuit-open\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2146 Code: Fuel Injector Group &quot;A&quot; Supply Voltage Circuit \/ Open - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Find out the meaning of code P2146 and its common causes and symptoms. Learn what to do if you get this code from your OBD scanner.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2146-code-fuel-injector-group-a-supply-voltage-circuit-open\/\" \/>\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=\"2022-09-01T09:58:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-05T01:28:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/08\/different-fuel-injectors-for-car.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1700\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\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\\\/p2146-code-fuel-injector-group-a-supply-voltage-circuit-open\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2146-code-fuel-injector-group-a-supply-voltage-circuit-open\\\/\"},\"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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