{"id":67865,"date":"2022-04-03T20:05:54","date_gmt":"2022-04-04T03:05:54","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=67865"},"modified":"2023-08-17T16:24:08","modified_gmt":"2023-08-17T23:24:08","slug":"p0620-code-generator-control-circuit-malfunction","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p0620-code-generator-control-circuit-malfunction\/","title":{"rendered":"P0620 Code: Generator Control Circuit Malfunction"},"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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column_9f9aa2-45 > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_9f9aa2-45 > .kt-inside-inner-col,.kadence-column_9f9aa2-45 > .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_9f9aa2-45 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_9f9aa2-45 > .kt-inside-inner-col{flex-direction:column;}.kadence-column_9f9aa2-45 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_9f9aa2-45 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_9f9aa2-45{position:relative;}@media all and (max-width: 1024px){.kadence-column_9f9aa2-45 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_9f9aa2-45 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_9f9aa2-45 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-2136a9  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-785815\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_26d82a-27, .wp-block-kadence-advancedheading.kt-adv-heading_26d82a-27[data-kb-block=\"kb-adv-heading_26d82a-27\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_26d82a-27 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_26d82a-27[data-kb-block=\"kb-adv-heading_26d82a-27\"] 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_26d82a-27 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_26d82a-27[data-kb-block=\"kb-adv-heading_26d82a-27\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_26d82a-27 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_26d82a-27\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>DTC P0620 stands for &ldquo;Generator Control Circuit Malfunction.&rdquo; It&rsquo;s logged when the PCM detects a problem in the signals coming from the generator control circuit.<\/li><li>Some problems that could trigger this code include open or shorted wirings, a bad alternator, insufficient control module ground, and a PCM programming error.<\/li><li>Driving with this code isn&rsquo;t recommended because it can cause drivability issues, stalling when idling, and delayed engine cranking.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>On-board diagnostic trouble codes are meant to help drivers and\/or mechanics diagnose vehicle problems. In order to identify what has caused them to be logged, you must first find out what the retrieved code means.<\/p>\n\n\n\n<p>Did your scan tool retrieve a P0620 code? This generic trouble code points to a possible problem in your vehicle&rsquo;s generator control circuit. Learn more about it through this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P0620 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) P0620 stands for &ldquo;Generator Control Circuit Malfunction.&rdquo;<\/p>\n\n\n\n<p>The powertrain control module (PCM) energizes and monitors the generator control circuit as you drive your vehicle. Each time you switch the ignition on, internal self-tests are done. The PCM uses the controller area network (CAN) to monitor and compare signals from each individual module. It does this to ensure that the controllers are communicating with each other properly.<\/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\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU-1024x789.jpg\" alt=\"Inside Composition of an Internal Control Module or ECU\" class=\"wp-image-68019\" width=\"1024\" height=\"789\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU-1024x789.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU-300x231.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU-768x592.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU-1536x1184.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU-150x116.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/Inside-Composition-of-an-Internal-Control-Module-or-ECU.jpg 1700w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The powertrain control module (PCM) energizes and monitors the generator control circuit as you drive your vehicle.<\/figcaption><\/figure>\n\n\n\n<p>Once the PCM detects a problem as it monitors signals from the generator control circuit, it will trigger the P0620 code. It&rsquo;s important to note that driving with this trouble code isn&rsquo;t recommended. Bring your vehicle to the nearest shop right away for proper diagnosis.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P0620 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 P0620 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Open or shorted <a href=\"https:\/\/www.carparts.com\/blog\/car-wiring\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"wirings\">wirings<\/a> (general control circuit)<\/li><li>Bad <a href=\"https:\/\/www.carparts.com\/alternator\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"alternator\">alternator<\/a>\/<a href=\"https:\/\/www.carparts.com\/generator\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"generator assembly\">generator assembly<\/a><\/li><li>Insufficient control module ground<\/li><li><a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> 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 P0620 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Battery\/charging light illuminated<\/li><li>Drivability problems<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-shuts-off-while-driving-causes-what-to-do\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Engine might stall when idling\">Engine might stall when idling<\/a><\/li><li>Delayed engine cranking<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P0620 Code<\/h2>\n\n\n\n<p>The P0620 is a generic code that can be seen across several makes and models. However, this does not mean there&rsquo;s one diagnostic procedure that will work for all vehicles. The steps for diagnosing this code will vary depending on your vehicle&rsquo;s specifications.<\/p>\n\n\n\n<p>Check out this video to get an idea of what the diagnostic process 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=\"2016 Ford F150 P0620 and Battery Light On\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/OL9bXxvTZkw?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 P050D Code<\/h2>\n\n\n\n<p>The symptoms of code P0620 can be similar across several types of vehicles. However, that does not mean that there&rsquo;s one solution that will work for all makes and models. Make sure to refer to a factory repair guide that is specific to your car.<\/p>\n\n\n\n<p>If you&rsquo;d like to troubleshoot this code on your own, make sure to consult a vehicle-specific <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>. These resources contain the appropriate diagnostic and repair procedures for this code. If you&rsquo;re not an experienced automotive DIYer, we strongly suggest leaving the job to a trusted professional.<\/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\"> 2<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>On-board diagnostic trouble codes are meant to help drivers and\/or mechanics diagnose vehicle problems. In order to identify what has&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p0620-code-generator-control-circuit-malfunction\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":68018,"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],"ppma_author":[2607,2855],"class_list":{"0":"post-67865","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":"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>P0620 Code: Generator Control Circuit Malfunction - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Know more about code P0620, its common causes, and the triggers associated with it. Plus find out what to do if your car logs this 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\/p0620-code-generator-control-circuit-malfunction\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0620 Code: Generator Control Circuit Malfunction - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Know more about code P0620, its common causes, and the triggers associated with it. Plus find out what to do if your car logs this code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p0620-code-generator-control-circuit-malfunction\/\" \/>\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=\"2022-04-04T03:05:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-17T23:24:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/03\/man-performs-hood-inspection-looking-for-pcm.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\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\\\/p0620-code-generator-control-circuit-malfunction\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p0620-code-generator-control-circuit-malfunction\\\/\"},\"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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