{"id":75863,"date":"2022-10-16T16:09:02","date_gmt":"2022-10-16T23:09:02","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=75863"},"modified":"2023-09-04T19:27:20","modified_gmt":"2023-09-05T02:27:20","slug":"p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high\/","title":{"rendered":"P2128 Code: Throttle\/Pedal Position Sensor\/Switch &#8220;E&#8221; Circuit High"},"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_cfcc86-9d > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_cfcc86-9d > .kt-inside-inner-col,.kadence-column_cfcc86-9d > .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_cfcc86-9d > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_cfcc86-9d > .kt-inside-inner-col{flex-direction:column;}.kadence-column_cfcc86-9d > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_cfcc86-9d > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_cfcc86-9d{position:relative;}@media all and (max-width: 1024px){.kadence-column_cfcc86-9d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_cfcc86-9d > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_cfcc86-9d qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-d418bb  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-f3392d\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_084c3d-ef, .wp-block-kadence-advancedheading.kt-adv-heading_084c3d-ef[data-kb-block=\"kb-adv-heading_084c3d-ef\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_084c3d-ef mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_084c3d-ef[data-kb-block=\"kb-adv-heading_084c3d-ef\"] 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_084c3d-ef img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_084c3d-ef[data-kb-block=\"kb-adv-heading_084c3d-ef\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_084c3d-ef summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_084c3d-ef\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Diagnostic trouble code (DTC) P2128 stands for &ldquo;Throttle\/Pedal Position Sensor\/Switch &lsquo;E&rsquo; Circuit High.&rdquo; It applies to vehicles with electronic throttle control, a type of drive-by-wire system.<\/li><li>The P2128 code will trigger if the powertrain control module (PCM) receives a signal from the throttle position sensor and pedal position sensor that&rsquo;s too high for a certain amount of time.<\/li><li>Causes of the P2128 code include a failed accelerator pedal position sensor, a bad PCM, and a faulty throttle control motor.<\/li><li>Symptoms of the P2128 code include illuminated warning lights, reduced engine performance, and the engine going into limp mode.<\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>The electronic throttle control (ETC) regulates the operation of the throttle valve. It determines when, by how much, and how long the valve should stay open. To achieve accurate performance, the ETC draws data from devices like the <a href=\"https:\/\/www.carparts.com\/throttle-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle position sensor\">throttle position sensor<\/a> and <a href=\"https:\/\/www.carparts.com\/accelerator-pedal-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"accelerator pedal position sensor\">accelerator pedal position sensor<\/a>.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.carparts.com\/engine-control-module\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM\">PCM<\/a> will log a P2128 code when it detects a signal input voltage from the throttle position sensor or pedal position sensor that exceeds the correct values stored in its memory.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2128 Code Mean?<\/h2>\n\n\n\n<p>The <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) P2128 indicates &ldquo;Throttle\/Pedal Position Sensor\/Switch &ldquo;E&rdquo; Circuit High.&rdquo; It applies to vehicles with electronic throttle control, a type of drive-by-wire system.<\/p>\n\n\n\n<p>The accelerator pedal position sensor activates when you step on the gas pedal. It transmits a voltage signal to the PCM to inform the latter about how much power the engine needs to produce.<\/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\/driver-pressing-the-gas-pedal-to-accelerate-1024x684.jpg\" alt=\"driver pressing the gas pedal to accelerate\" class=\"wp-image-75864\" width=\"1024\" height=\"684\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-1024x684.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-768x513.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-1536x1025.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-scaled.jpg 2048w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-1200x800.jpg 1200w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/driver-pressing-the-gas-pedal-to-accelerate-150x100.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>The accelerator pedal position sensor activates when you step on the gas pedal.<\/figcaption><\/figure>\n\n\n\n<p>In response, the PCM will open the throttle plate to let more air through. The throttle position sensor measures how far the plate has opened, allowing the PCM to adjust the opening as needed.<\/p>\n\n\n\n<p>The PCM regularly checks the signals sent by the throttle position sensor and pedal position sensor. If the signal from one of these sensors is too high for a certain amount of time, it will set the generic code P2128.<\/p>\n\n\n\n<p><em><strong>Note:<\/strong> The definition of code P2128 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 a Code P2128?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Failed accelerator pedal position sensor<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Bad PCM\">Bad PCM<\/a><\/li><li>Faulty throttle control motor<\/li><li>Circuit problems, such as a damaged wire or poor connection<\/li><li>An <a href=\"https:\/\/www.carparts.com\/blog\/bad-throttle-position-sensor-symptoms-what-you-need-to-know\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"issue with the throttle position sensor\">issue with the throttle position sensor<\/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 a Code P2128?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Illuminated warning lights<\/li><li>Reduced engine performance<\/li><li>Engine goes into limp home mode, which will limit its performance<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2128 Code<\/h2>\n\n\n\n<p>The P2128 code is a generic code that can show up in various makes and models. The specifics can vary between individual cases&ndash;an approach that works for some vehicles may not prove suitable for others.<\/p>\n\n\n\n<p>Running diagnostic checks for P2128 and other codes requires confidence, experience, knowledge, and skill in DIY auto repair. There are many times when it&rsquo;s better to bring your vehicle to a trusted auto repair shop.<\/p>\n\n\n\n<p>To help you get started, here is a video 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=\"2012 Chevy Express P2128 Reduced Engine Power diagnose.\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/e_btxLXg0rE?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 P2128 Code<\/h2>\n\n\n\n<p>Attempting to fix a P2128 code can become a challenging task if you don&rsquo;t have the right tools and know-how to test the electronic throttle control. In most cases, it&rsquo;s best to leave the job to professionals.<\/p>\n\n\n\n<p>Are you a DIYer with advanced technical knowledge and hands-on experience to test and replace their vehicle&rsquo;s electronic throttle control on their own? It&rsquo;s still advisable to draw upon the related <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 refer to an online repair database\">repair manual or refer to an online repair database<\/a> to refresh your knowledge and make the job easier.<\/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 electronic throttle control (ETC) regulates the operation of the throttle valve. It determines when, by how much, and how&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":75865,"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":[1680,1323,1679],"ppma_author":[2607,2855],"class_list":{"0":"post-75863","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-obd-ii-trouble-codes","8":"tag-accelerator-pedal-position-sensor","9":"tag-engine-control-module-2","10":"tag-throttle-position-sensor","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>P2128 Code: Throttle\/Pedal Position Sensor\/Switch &quot;E&quot; Circuit High - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Learn what a P2128 code means, the possible causes, and the common symptoms associated with 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\/p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2128 Code: Throttle\/Pedal Position Sensor\/Switch &quot;E&quot; Circuit High - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Learn what a P2128 code means, the possible causes, and the common symptoms associated with this code.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high\/\" \/>\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=\"2022-10-16T23:09:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-05T02:27:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/10\/throttle-position-sensor-and-accelerator-pedal-position-sensor-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2048\" \/>\n\t<meta property=\"og:image:height\" content=\"1367\" \/>\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\\\/p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2128-code-throttle-pedal-position-sensor-switch-e-circuit-high\\\/\"},\"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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