{"id":76964,"date":"2025-09-17T13:35:50","date_gmt":"2025-09-17T18:35:50","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=76964"},"modified":"2025-09-17T13:35:52","modified_gmt":"2025-09-17T18:35:52","slug":"p0122-obd2-throttle-pedal-position-sensor-switch-a-circuit-low","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0122-obd2-throttle-pedal-position-sensor-switch-a-circuit-low","title":{"rendered":"P0122 OBD2: Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low"},"content":{"rendered":"<p>The P0122 OBD-II code indicates a problem with the Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low Input. This code is part of the OBD-II system which monitors the performance of various components in your vehicle&#8217;s engine.<\/p>\n<h2>What Does the P0122 Code Mean?<\/h2>\n<p>OBD-II Code P0122 is defined as a Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low Input. This means that the Powertrain Control Module (PCM) has detected a low voltage signal coming from the throttle or pedal position sensor, which measures the position of the accelerator pedal and relays that information to the PCM.<\/p>\n<h2>What Causes the P0122 Code?<\/h2>\n<p>The P0122 code can be triggered by various issues, including:<\/p>\n<ul>\n<li>Defective Throttle Position Sensor or Switch<\/li>\n<li>Torn or jammed floor mats interfering with the pedal<\/li>\n<li>Faulty or corroded wiring or connections related to the Throttle\/Pedal Position Sensor\/Switch<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0122 Code?<\/h2>\n<p>Common symptoms associated with the P0122 code include:<\/p>\n<ul>\n<li>Illumination of the Check Engine Light<\/li>\n<li>Possible hard starting of the engine<\/li>\n<li>Engine hesitation during acceleration<\/li>\n<li>No noticeable symptoms in some cases<\/li>\n<\/ul>\n<h2>How Serious Is the P0122 Code?<\/h2>\n<p>The P0122 code is classified as urgent. If not addressed promptly, it can lead to significant malfunctions that may endanger the vehicle&#8217;s performance and the safety of the driver and passengers. The PCM may limit the vehicle&#8217;s speed to 20 mph or less to protect the engine, which can leave you stranded or in unsafe situations.<\/p>\n<h2>How to Diagnose the P0122 Code<\/h2>\n<p>Diagnosing the P0122 code involves several steps:<\/p>\n<ul>\n<li>Record freeze frame data and perform a test drive to replicate the conditions that triggered the code.<\/li>\n<li>Monitor engine load, Mass Air Flow, RPM, and road speed using a data streaming scan tool.<\/li>\n<li>Check the Throttle\/Pedal Position Sensor connector for a steady 5-volt reference voltage and a good ground.<\/li>\n<li>Perform tests on the Throttle\/Pedal Position Sensor output and observe voltage changes as you manually operate the throttle or pedal.<\/li>\n<\/ul>\n<h2>Common Repairs for the P0122 Code<\/h2>\n<p>Common repairs that may be necessary for resolving the P0122 code include:<\/p>\n<ul>\n<li>Replacing the Throttle Position Sensor or Switch if defective<\/li>\n<li>Repairing or replacing damaged wiring or connections<\/li>\n<li>Clearing out any obstructions such as jammed floor mats<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0122 Code?<\/h2>\n<p>The cost to fix the P0122 code can vary widely based on the underlying issue. Basic repairs, such as cleaning connections, may cost less than $100, while replacing the Throttle Position Sensor can range from $100 to $300 depending on labor rates and parts.<\/p>\n<h2>Can I Fix the P0122 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may be able to address minor issues such as cleaning connections or checking for obstructions, it is recommended to have a professional perform a full diagnosis of the P0122 code to ensure that all potential causes are thoroughly evaluated and repaired as necessary.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0122 OBD-II code indicates a problem with the Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low Input. This code is part of the OBD-II system which monitors the performance of various components in your vehicle&#8217;s engine. What Does the P0122 Code Mean? OBD-II Code P0122 is defined as a Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low Input. &hellip;<\/p>\n","protected":false},"author":26,"featured_media":96919,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[11987],"tags":[],"class_list":["post-76964","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-p-obd2-codes-powertrain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P0122 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0122 code, what causes throttle\/pedal position sensor\/switch &#039;A&#039; circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.\" \/>\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.emanualonline.com\/blog\/p0122-obd2-throttle-pedal-position-sensor-switch-a-circuit-low\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0122 OBD2: Throttle\/Pedal Position Sensor\/Switch &quot;A&quot; Circuit Low\" \/>\n<meta property=\"og:description\" content=\"The P0122 OBD-II code indicates a problem with the Throttle\/Pedal Position Sensor\/Switch &quot;A&quot; Circuit Low Input. 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He also loves cats, Johnny Cash and Subarus.","sameAs":["https:\/\/www.facebook.com\/jee514","https:\/\/www.instagram.com\/rat_in_chief\/","https:\/\/www.linkedin.com\/in\/jean-claude-landry-857781186\/"],"url":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"}]}},"uagb_featured_image_src":{"full":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0122-obd2-throttlepedal-position-sensorswitch-a-circuit-low-1050x525.png",1050,525,true]},"uagb_author_info":{"display_name":"JC Landry","author_link":"https:\/\/www.emanualonline.com\/blog\/author\/jclandry"},"uagb_comment_info":0,"uagb_excerpt":"The P0122 OBD-II code indicates a problem with the Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low Input. This code is part of the OBD-II system which monitors the performance of various components in your vehicle&#8217;s engine. What Does the P0122 Code Mean? OBD-II Code P0122 is defined as a Throttle\/Pedal Position Sensor\/Switch &#8220;A&#8221; Circuit Low Input.&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/76964","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/comments?post=76964"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/76964\/revisions"}],"predecessor-version":[{"id":83663,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/76964\/revisions\/83663"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/96919"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=76964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=76964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=76964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}