{"id":77170,"date":"2022-11-01T22:54:48","date_gmt":"2022-11-02T05:54:48","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=77170"},"modified":"2023-09-18T18:27:56","modified_gmt":"2023-09-19T01:27:56","slug":"p2123-code-throttle-pedal-position-sensor-switch-d-circuit-high","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2123-code-throttle-pedal-position-sensor-switch-d-circuit-high\/","title":{"rendered":"P2123 Code: Throttle\/Pedal Position Sensor\/Switch \u201cD\u201d 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_90198a-4c > .kt-inside-inner-col{border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;}.kadence-column_90198a-4c > .kt-inside-inner-col,.kadence-column_90198a-4c > .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_90198a-4c > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column_90198a-4c > .kt-inside-inner-col{flex-direction:column;}.kadence-column_90198a-4c > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column_90198a-4c > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column_90198a-4c{position:relative;}@media all and (max-width: 1024px){.kadence-column_90198a-4c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column_90198a-4c > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column inner-column-1 kadence-column_90198a-4c qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-188603  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-be33c3\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading_aa97d1-bf, .wp-block-kadence-advancedheading.kt-adv-heading_aa97d1-bf[data-kb-block=\"kb-adv-heading_aa97d1-bf\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading_aa97d1-bf mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading_aa97d1-bf[data-kb-block=\"kb-adv-heading_aa97d1-bf\"] 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_aa97d1-bf img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading_aa97d1-bf[data-kb-block=\"kb-adv-heading_aa97d1-bf\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading_aa97d1-bf summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading_aa97d1-bf\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>DTC P2123 stands for &ldquo;Throttle\/Pedal Position Sensor\/Switch &lsquo;D&rsquo; Circuit High,&rdquo; and it&rsquo;s logged when the PCM detects abnormally high input voltage in the sensor, switch, or circuit in throttle control system D.<\/li><li>Bad throttle position sensors, throttle control motor failure, and wiring issues are some of the problems that could trigger this code.<\/li><li>Common indicators of code P2123 include a lit check engine light, poor engine performance, and your vehicle entering &ldquo;limp mode&rdquo;.<\/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\/throttle-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle position sensor\">throttle position sensor<\/a> is a potentiometer or hall-effect sensor that sends an input to 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), informing the computer about how much the driver is holding the throttle open. Meanwhile, the <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> (APP) informs the PCM about the position of the accelerator pedal on cars that have an electronic <a href=\"https:\/\/www.carparts.com\/throttle-actuator\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle actuator\">throttle actuator<\/a> (TAC). If the PCM detects an issue with the throttle position (TP) sensor or accelerator pedal position sensor (APP), a P2123 code will be logged by on-board diagnostics.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2123 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) P2123 stands for &ldquo;Throttle\/Pedal Position Sensor\/Switch &lsquo;D&rsquo; Circuit High.&rdquo;<\/p>\n\n\n\n<p>As the driver steps on the accelerator pedal, the APP sensor sends a reference voltage signal to the PCM and informs the computer about how much power is being requested from the engine. At the same time, the TP sensor informs the PCM about the engine&rsquo;s throttle position.<\/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\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-1024x681.jpg\" alt=\"accelerator pedal position sensor and throttle position sensor\" class=\"wp-image-77178\" width=\"1024\" height=\"681\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-1024x681.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-300x200.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-768x511.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-1536x1022.jpg 1536w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-600x400.jpg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor-150x100.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/accelerator-pedal-position-sensor-and-throttle-position-sensor.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption>Issues with the TP or APP sensors can send the vehicle into limp mode, resulting in reduced engine performance, disabled cruise control (if applicable), or little to no response from the accelerator pedal.<\/figcaption><\/figure>\n\n\n\n<p>Most TP sensors have two additional sensors that act as a fail-safe measure for the PCM to diagnose certain problems regarding throttle angle feedback. The same is true for the APP sensors; vehicles with TAC systems use more than one APP sensor as a fail-safe measure.<\/p>\n\n\n\n<p>Issues with the TP or APP sensors can send the vehicle into limp mode, resulting in reduced engine performance, disabled cruise control (if applicable), or little to no response from the accelerator pedal.<\/p>\n\n\n\n<p><strong><em>Note:<\/em><\/strong><em> The definition of code P2123 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 P2123 Code?<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Faulty accelerator pedal position assembly with integrated APP sensors<\/li><li>Bad throttle position sensor<\/li><li>Throttle control motor failure<\/li><li>Wiring issues<\/li><li><a href=\"https:\/\/www.carparts.com\/blog\/car-pcm-meaning-symptoms-of-failure-and-more\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"PCM failure\">PCM failure<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2123 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>Poor engine performance<\/li><li>Vehicle in <a href=\"https:\/\/www.carparts.com\/blog\/web-stories\/what-is-limp-mode\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"limp mode\">limp mode<\/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\">How to Diagnose the P2123 Code<\/h2>\n\n\n\n<p>DTC P2123 is a generic powertrain code that can be logged in vehicles with an OBD-II system. While this might be the case, keep in mind that the steps for diagnosing this trouble code can vary, depending on vehicle specifications.<\/p>\n\n\n\n<p>Diagnosing this trouble code typically involves using a scan tool and inspecting the affected system for any sign of damage or electrical issues. If you&rsquo;re not familiar with the process, it&rsquo;s a good idea to have a trained professional do the job for you instead. Otherwise, you can go ahead and do it yourself.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Fix the P2123 Code<\/h2>\n\n\n\n<p>Having sufficient technical knowledge of automotive repair and the right tools is crucial in resolving a trouble code like P2123. If you&rsquo;re not confident with your DIY skills yet, it&rsquo;s best to bring your vehicle to the nearest auto repair shop and have a certified mechanic perform the necessary repairs. This will ensure that all steps and protocols are followed correctly.<\/p>\n\n\n\n<p>But if you think you can handle the task on your own, make sure to have the right information before proceeding. There&rsquo;s no such thing as a universal solution that will resolve all trouble codes for all makes and models, so vehicle-specific information is critical in ensuring a successful repair job. You&rsquo;ll find this type of information in guides like those from Chilton or an ALLDATA subscription.<\/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 throttle position sensor is a potentiometer or hall-effect sensor that sends an input to the powertrain control module (PCM),&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2123-code-throttle-pedal-position-sensor-switch-d-circuit-high\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":4,"featured_media":77179,"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":[1680,1323,2094,1679],"ppma_author":[2607,2855],"class_list":{"0":"post-77170","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-actuator","11":"tag-throttle-position-sensor","12":"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>P2123 Code: Throttle\/Pedal Position Sensor\/Switch \u201cD\u201d Circuit High - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Has your vehicle logged a P2123 code? Read on to find out what it means as well as the most common symptoms associated with it.\" \/>\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\/p2123-code-throttle-pedal-position-sensor-switch-d-circuit-high\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2123 Code: Throttle\/Pedal Position Sensor\/Switch \u201cD\u201d Circuit High - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Has your vehicle logged a P2123 code? Read on to find out what it means as well as the most common symptoms associated with it.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.carparts.com\/blog\/p2123-code-throttle-pedal-position-sensor-switch-d-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=\"2022-11-02T05:54:48+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-19T01:27:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2022\/11\/car-tp-sensor-and-app-sensor-causing-p2123-code.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=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2123-code-throttle-pedal-position-sensor-switch-d-circuit-high\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.carparts.com\\\/blog\\\/p2123-code-throttle-pedal-position-sensor-switch-d-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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