{"id":14888,"date":"2021-05-03T20:00:00","date_gmt":"2021-05-04T03:00:00","guid":{"rendered":"https:\/\/blogv2prod.wpenginepowered.com\/blog\/?p=14888"},"modified":"2025-05-20T00:03:22","modified_gmt":"2025-05-20T07:03:22","slug":"p2138-code-throttle-pedal-position-sensor-switch-d-e-voltage-correlation","status":"publish","type":"post","link":"https:\/\/www.carparts.com\/blog\/p2138-code-throttle-pedal-position-sensor-switch-d-e-voltage-correlation\/","title":{"rendered":"P2138 Code: Throttle\/Pedal Position Sensor\/Switch D\/E Voltage Correlation"},"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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span><style>.kadence-column14888_2b96d6-55 > .kt-inside-inner-col,.kadence-column14888_2b96d6-55 > .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-column14888_2b96d6-55 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column14888_2b96d6-55 > .kt-inside-inner-col{flex-direction:column;}.kadence-column14888_2b96d6-55 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column14888_2b96d6-55 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column14888_2b96d6-55{position:relative;}@media all and (max-width: 1024px){.kadence-column14888_2b96d6-55 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column14888_2b96d6-55 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column14888_2b96d6-55 inner-column-1 qk-look-widget\"><div class=\"kt-inside-inner-col\">\n<div class=\"wp-block-ultimate-post-row ultp-block-229047  qk-main-wrap\"><div class=\"ultp-row-wrapper\"><div class=\"ultp-row-content\">\n<div class=\"wp-block-ultimate-post-column ultp-block-22e4a6\"><div class=\"ultp-column-wrapper\"><style>.wp-block-kadence-advancedheading.kt-adv-heading14888_e4969c-82, .wp-block-kadence-advancedheading.kt-adv-heading14888_e4969c-82[data-kb-block=\"kb-adv-heading14888_e4969c-82\"]{text-align:center;font-size:20px;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading14888_e4969c-82 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading14888_e4969c-82[data-kb-block=\"kb-adv-heading14888_e4969c-82\"] 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-heading14888_e4969c-82 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading14888_e4969c-82[data-kb-block=\"kb-adv-heading14888_e4969c-82\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<div class=\"kt-adv-heading14888_e4969c-82 summary-title wp-block-kadence-advancedheading\" data-kb-block=\"kb-adv-heading14888_e4969c-82\"><span>Summary<\/span><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DTC P2138 stands for &ldquo;Throttle\/Pedal Position Sensor\/Switch D\/E Voltage Correlation.&rdquo;<\/li>\n\n\n\n<li>This code is triggered when the ECM or PCM detects that the signals from the two throttle position sensors don&rsquo;t correlate.<\/li>\n\n\n\n<li>Code P2138 is commonly caused by a failed TP or APP sensor, circuit issues, and problems with the PCM.<\/li>\n\n\n\n<li>Symptoms of P2138 include a lit check engine light, loss of power, and a stalling engine.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n\n\n<p>If your check engine light (MIL) is on and the code P2138 shows up on the scan tool when you connect it to your car&rsquo;s OBD port, you&rsquo;ll want to know what it means and its possible causes. This short guide will help you figure out its causes, symptoms, and other information you need to know about this specific <a href=\"https:\/\/www.carparts.com\/blog\/search-obd2-codes-list\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"error code\">error code<\/a>. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-1024x1024.jpeg\" alt=\"throttle position sensor image\" class=\"wp-image-14902\" style=\"width:1024px;height:1024px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-1024x1024.jpeg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-300x300.jpeg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-768x768.jpeg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-75x75.jpeg 75w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-600x600.jpeg 600w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-928x928.jpeg 928w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image-150x150.jpeg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2020\/08\/throttle-position-sensor-image.jpeg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Code P1238 indicates that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do not correlate.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What Does the P2138 Code Mean?<\/h2>\n\n\n\n<p>Diagnostic trouble code (DTC) P2138 stands for &ldquo;Throttle\/Pedal Position Sensor\/Switch D\/E Voltage Correlation.&rdquo; It is triggered when the vehicle&rsquo;s engine control module (ECM) or powertrain control module (PCM) detects that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do not correlate.<\/p>\n\n\n\n<p>When that happens, the ECM\/PCM can&rsquo;t be sure of the actual accelerator position and will typically illuminate a warning light (wrench or throttle blade light, etc.) and limit throttle response to just under half throttle or, in extreme cases, the engine might not accelerate at all.<\/p>\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<p>The PCM determines ETC motor operation based primarily on input from a pair of <a href=\"https:\/\/www.carparts.com\/throttle-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"throttle position (TP) sensors\">throttle position (TP) sensors<\/a> mounted on the throttle body and a pair of <a href=\"https:\/\/www.carparts.com\/accelerator-pedal-position-sensor\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"accelerator pedal position (APP) sensors\">accelerator pedal position (APP) sensors<\/a> connected to the accelerator pedal. Pairs of sensors are used in both places as a solidly dependable way of detecting faults. Remember, unlike the redundant circuits and hydraulics in military aircraft, these sensors don&rsquo;t come in pairs so one sensor will still work if the other one fails. If one sensor doesn&rsquo;t work or doesn&rsquo;t agree with the other sensor as it should, fail-safe mode kicks in, reducing or eliminating throttle response for safety purposes.<\/p>\n\n\n\n<p>Depending on the vehicle manufacturer, code P2138 can indicate either the car&rsquo;s two TP sensors don&rsquo;t agree, or it&rsquo;s two APP sensors don&rsquo;t agree. <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Depending on the vehicle manufacturer, code P2138 can indicate that either the car&rsquo;s two TP (throttle position) sensors don&rsquo;t agree, or its two APP (accelerator pedal position) sensors don&rsquo;t agree.<\/p>\n<cite>&ndash;<a href=\"https:\/\/www.carparts.com\/blog\/author\/richardmccuistian\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Richard McCuistian, ASE Certified Master Automobile Technician\">Richard McCuistian, ASE Certified Master Automobile Technician<\/a><\/cite><\/blockquote>\n\n\n\n<p>P2138 is a common issue among the following makes: Chevrolet (especially on a Chevy Malibu), Nissan, Honda, Subaru, and Acura.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">An In-depth Look at Accelerator Pedal Position Sensors<\/h2>\n\n\n\n<p>Accelerator pedal position (APP) sensors provide information to the ECM\/PCM concerning driver throttle requests. The ECM\/PCM processes that information very rapidly, mirroring pedal movement by moving the throttle plate. The throttle body has a motor that drives the throttle plate open and closed (both ways are powered, so keep your finger out of the throttle body). There is a throttle position sensor (TPS) on the throttle body for feedback purposes &ndash; the ECM\/PCM needs to know what the throttle plate is doing at all times.<\/p>\n\n\n\n<p>The driver&rsquo;s perception of acceleration with properly operating electronic throttle control (ETC) is virtually the same as it would be if there was a throttle cable connected from the pedal to the throttle body plate. No cruise control parts are needed on ETC-equipped vehicles, only software. No idle speed control parts are needed &ndash; once again, ECM\/PCM software handles it all.<\/p>\n\n\n\n<p>Redundant accelerator pedal sensors are used to prevent possible runaway conditions, which would obviously be very bad. But one wrinkle is that the two (or three) sensors will put out slightly different signals; it&rsquo;s that way on every vehicle &ndash; some vehicles will have a &ldquo;mirrored&rdquo; signal from sensor to sensor and others will have a lower voltage signal on one sensor and higher voltage signal on the second sensor.<\/p>\n\n\n\n<p>This is to differentiate between the two sensor signals for fault detection &ndash; if one of the two sensors were to fail on a system designed so that both sensors read exactly the same or if the sensor output wires were to short together, the ECM\/PCM would have no way of knowing about the failed sensor or circuit. With the sensor signals slightly different, a fault easily detected.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"692\" src=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/toyota-tps-diagram-1024x692.jpg\" alt=\"diagram of a Toyota throttle pedal sensor array\" class=\"wp-image-80896\" style=\"width:1024px;height:692px\" srcset=\"https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/toyota-tps-diagram-1024x692.jpg 1024w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/toyota-tps-diagram-300x203.jpg 300w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/toyota-tps-diagram-768x519.jpg 768w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/toyota-tps-diagram-150x101.jpg 150w, https:\/\/www.carparts.com\/blog\/wp-content\/uploads\/2023\/02\/toyota-tps-diagram.jpg 1500w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><figcaption class=\"wp-element-caption\">Toyota throttle pedal sensor array diagram | Image Source: Richard McCuistian<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Possible Causes of the P2138 Code?<\/h2>\n\n\n\n<p>All OBD-II codes have multiple possible causes. As for what causes code P2138, there are several possibilities. These include the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/bad-throttle-position-sensor-symptoms-what-you-need-to-know\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"A failed TP\">A failed TP<\/a> or APP sensor<\/li>\n\n\n\n<li>Circuit issues, such as damaged wires or poor connections<\/li>\n\n\n\n<li>An issue with the PCM, such as software in need of an update <\/li>\n<\/ul>\n\n\n\n    <div class=\"perspective-widget\">\n        <div class=\"pt-child-wrap\">\n\n            <div class=\"pt-col-item1\">\n                <figure class=\"aligncenter size-large\">\n                        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/dpr_auto,f_auto,q_auto\/carparts\/blog\/plugins\/amp\/avatar-comments\" class=\"com-thumb\" alt=\"Avatar of CarParts.com Research Team\" width=\"100\" height=\"100\">\n                <\/figure>\n                <p>\n                    <strong>Mia, Chief Mechanic @ CarParts.com<\/strong> \n                    <span>User<\/span>\n                <\/p>\n            <\/div>\n\n            <div class=\"pt-col-item2\">\n                <div class=\"protip-desc\">\n                    <div class=\"perspective-help-tip\">   \n                        <p>There&rsquo;s more than one way to look at an issue. &ldquo;Community Perspectives&rdquo; highlight authentic personal viewpoints and real-life experiences by the CarParts.com community, including our readers, experts, and product specialists, among others. This can help you make better informed decisions about your car.<\/p>\n                    <\/div>\n                    <div class=\"perspective-help-caption tooltip\"> \n                        <h2>CarParts.com Community Perspectives<\/h2>\n                        <p>It&rsquo;s possible that low-voltage issues could be causing code P2138 to set. On your car, when the battery voltage drops below 10 volts (or the battery is disconnected, or power to the ECM is lost), the throttle body&rsquo;s basic setting may be lost. To fix the problem, a basic setting relearn procedure will need to be performed using an OEM-level scan tool.<\/p>\n                        <div class=\"cta-btn\">\n                            <a href=\"https:\/\/www.carparts.com\/blog\/p2138-code-throttle-pedal-position-sensor-switch-d-e-voltage-correlation\/#commentform\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Jump to Discussions\">Jump to Discussions<\/a>\n                        <\/div>\n                    <\/div>\n                <\/div>\n            <\/div>\n\n        <\/div>\n    <\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What are the Common Symptoms of the P2138 Code?<\/h2>\n\n\n\n<p>Below are some of the most common symptoms of the P2138 code:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.carparts.com\/blog\/check-engine-light-flashing\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"Check engine light is on\">Check engine light is on<\/a><\/li>\n\n\n\n<li>Loss or lack of power <\/li>\n\n\n\n<li>The engine stalls when it stops<\/li>\n\n\n\n<li>Vehicle stuck in &ldquo;<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>&rdquo; or &ldquo;reduced power mode&rdquo;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How to Diagnose the P2138 Code<\/h2>\n\n\n\n<p>Many problems can trigger the P2138 code, from a defective TP sensor  to faulty wiring in the accelerator pedal. It usually takes a seasoned mechanic to pinpoint its exact cause. <\/p>\n\n\n\n<p>However, if you are confident with your automotive repair know-how, you can try to diagnose the code yourself. <\/p>\n\n\n\n<p>Here are a couple of videos that demonstrate what the diagnostic 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-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"2009 Chevy Silverado P2138 Accelerator Pedal Position\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/j8JuRuH3aMw?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=\"Service Call: Chevy Trailblazer P2138\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/zf1WEatoTCc?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 P2138 Code<\/h2>\n\n\n\n<p>Even though numerous DTCs share causes, symptoms, and affected areas, there is no one-size-fits-all solution for OBD-II trouble codes. To fix the P2138 code, you&rsquo;ll have to identify its exact cause and determine the right repair process for your vehicle. And here&rsquo;s a solid piece of advice. Always carefully check wires and connections before replacing any parts. It&rsquo;s the smart thing to do. <\/p>\n\n\n\n<p>Use <a href=\"https:\/\/www.carparts.com\/blog\/best-online-resources-to-help-you-learn-how-to-fix-cars\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"online auto repair resources and guides\">online auto repair resources and guides<\/a> to figure out the right fix. To avoid accidentally worsening the problem with a solution that&rsquo;s inappropriate for your vehicle&rsquo;s make and model, consult your owner&rsquo;s manual. You can also secure an ALLDATA single-vehicle subscription for in-depth factory repair guides. <\/p>\n\n\n\n<p>If you are uncertain of your automotive know-how, it&rsquo;s best to let a professional diagnose and resolve the P2138 code. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Other Notes About P2138<\/h2>\n\n\n\n<p>The P2138 trouble code is triggered when there are problems with the throttle\/pedal position sensor\/switch. However, it&rsquo;s not the only code related to the throttle body and its circuitry. The <a href=\"https:\/\/www.carparts.com\/blog\/p2135-code-throttle-pedal-position-sensor-switch-a-b-voltage-correlation\/\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\"P2135\">P2135<\/a>, P2136, P2137, P2139, and P2140 DTCs also indicate issues in the same areas. Although somewhat related and seemingly similar, these codes will differ in their possible causes, symptoms, and solutions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Products Mentioned in this Guide<\/h2>\n\n\n\n<div class=\"reusable-productlink\">\n\n<!-- start of editable content -->\n\n<a href=\"https:\/\/www.carparts.com\/throttle-position-sensor\" target=\"_blank\" aria-label=\"Throttle Position Sensor\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/kit1-010319-02-a_1\">\n<strong>Throttle Position Sensor<\/strong>\n<\/a>\n\n<a href=\"https:\/\/www.carparts.com\/accelerator-pedal-position-sensor\" target=\"_blank\" aria-label=\"Accelerator Pedal Position Sensor\" rel=\"noopener\">\n<img decoding=\"async\" src=\"https:\/\/cld.partsimg.com\/image\/upload\/d_noimage.jpg,h_200,w_200,c_pad,f_auto,q_auto,dpr_auto,e_sharpen\/images\/rc32160001_1\">\n<strong>Accelerator Pedal Position Sensor<\/strong>\n<\/a>\n\n<!-- end of editable content -->\n\n<\/div>\n\n\n\n<p><\/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\"> 5<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>If your check engine light (MIL) is on and the code P2138 shows up on the scan tool when you&#8230; <a href=\"https:\/\/www.carparts.com\/blog\/p2138-code-throttle-pedal-position-sensor-switch-d-e-voltage-correlation\/\" rel=\"nofollow\">Read More<\/a><\/p>\n","protected":false},"author":1651,"featured_media":14906,"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":[1680,1679],"ppma_author":[2607,2985],"class_list":{"0":"post-14888","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-throttle-position-sensor","10":"entry"},"acf":{"adrotate_specific_mobile_ad":"","adrotate_specific_desktop_ad":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P2138 Code: Throttle\/Pedal Position Sensor\/Switch D\/E Voltage Correlation - In The Garage with CarParts.com<\/title>\n<meta name=\"description\" content=\"Did your OBD-II scan tool register a P2138 code? Learn this diagnostic trouble code\u2019s meaning, possible causes, and common symptoms.\" \/>\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\/p2138-code-throttle-pedal-position-sensor-switch-d-e-voltage-correlation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P2138 Code: Throttle\/Pedal Position Sensor\/Switch D\/E Voltage Correlation - In The Garage with CarParts.com\" \/>\n<meta property=\"og:description\" content=\"Did your OBD-II scan tool register a P2138 code? 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