{"id":78011,"date":"2025-08-25T13:19:20","date_gmt":"2025-08-25T18:19:20","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78011"},"modified":"2025-08-25T13:19:20","modified_gmt":"2025-08-25T18:19:20","slug":"p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high","title":{"rendered":"P0669 OBD2: PCM\/ECM\/TCM Internal Temperature Sensor &#8220;A&#8221; Circuit High"},"content":{"rendered":"<p>The P0669 OBD-II code indicates an issue with the temperature sensor circuit within the Powertrain Control Module (PCM), Engine Control Module (ECM), or Transmission Control Module (TCM). This code is triggered when the module detects that the internal temperature sensor is reporting a high voltage condition, which can prevent the module from functioning correctly.<\/p>\n<h2>What Does the P0669 Code Mean?<\/h2>\n<p>The P0669 code defines a malfunction in the PCM\/ECM\/TCM&#8217;s internal temperature sensor circuit. This circuit is essential for the control module to monitor its temperature and prevent overheating. If the module cannot accurately assess its temperature, it sets the P0669 code.<\/p>\n<h2>What Causes the P0669 Code?<\/h2>\n<p>Several factors can trigger the P0669 code, including:<\/p>\n<ul>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Transmission Control Module (TCM) failure<\/li>\n<li>Wiring issues in the temperature sensor circuit<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0669 Code?<\/h2>\n<p>When the P0669 code is present, drivers may experience:<\/p>\n<ul>\n<li>Decreased engine performance<\/li>\n<li>Transmission may not shift properly<\/li>\n<li>Possible engine overheating<\/li>\n<\/ul>\n<h2>How Serious Is the P0669 Code?<\/h2>\n<p>The P0669 code is considered urgent. It signifies a significant malfunction that can lead to severe engine damage or safety risks for the driver and passengers. Immediate attention is necessary to prevent further complications.<\/p>\n<h2>How to Diagnose the P0669 Code<\/h2>\n<p>To diagnose the P0669 code, a mechanic will typically follow these steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the presence of the P0669 code.<\/li>\n<li>Inspect the wiring and connections related to the PCM, ECM, and TCM for any signs of damage.<\/li>\n<li>Check the temperature sensor for proper operation.<\/li>\n<li>Test the PCM\/TCM for functionality and any fault codes.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0669 Code<\/h2>\n<p>Repairs for the P0669 code may include:<\/p>\n<ul>\n<li>Replacing the faulty temperature sensor<\/li>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Replacing the PCM or TCM if necessary<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0669 Code?<\/h2>\n<p>The cost to fix the P0669 code can vary widely based on the underlying issue. On average, repairs can range from $100 to $1,000, depending on whether a sensor needs to be replaced, wiring repaired, or if a control module replacement is necessary.<\/p>\n<h2>Can I Fix the P0669 Code Myself?<\/h2>\n<p>If you have experience with automotive repairs and diagnostics, you may be able to troubleshoot and fix the P0669 code yourself. However, due to the complexity of electronic systems in modern vehicles, it is often recommended to seek professional help to ensure proper diagnosis and repair.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P0669 OBD-II code indicates an issue with the temperature sensor circuit within the Powertrain Control Module (PCM), Engine Control Module (ECM), or Transmission Control Module (TCM). This code is triggered when the module detects that the internal temperature sensor is reporting a high voltage condition, which can prevent the module from functioning correctly. What &hellip;<\/p>\n","protected":false},"author":26,"featured_media":93782,"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-78011","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 P0669 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0669 code, what causes PCM\/ECM\/TCM internal temperature sensor &quot;A&quot; circuit high, 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\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0669 OBD2: PCM\/ECM\/TCM Internal Temperature Sensor &quot;A&quot; Circuit High\" \/>\n<meta property=\"og:description\" content=\"The P0669 OBD-II code indicates an issue with the temperature sensor circuit within the Powertrain Control Module (PCM), Engine Control Module (ECM), or\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\" \/>\n<meta property=\"og:site_name\" content=\"eManualOnline Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/EmanualOnline\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/jee514\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-25T18:19:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"JC Landry\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@eManualOnline\" \/>\n<meta name=\"twitter:site\" content=\"@eManualOnline\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"JC Landry\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\"},\"author\":{\"name\":\"JC Landry\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/person\\\/e803434ab3cc70008b22b56253223403\"},\"headline\":\"P0669 OBD2: PCM\\\/ECM\\\/TCM Internal Temperature Sensor &#8220;A&#8221; Circuit High\",\"datePublished\":\"2025-08-25T18:19:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\"},\"wordCount\":413,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png\",\"articleSection\":[\"P Codes - OBD2 Powertrain Codes\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\",\"name\":\"OBD2 Code P0669 \u2013 Causes, Symptoms, and Repairs\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png\",\"datePublished\":\"2025-08-25T18:19:20+00:00\",\"description\":\"Learn all about the P0669 code, what causes PCM\\\/ECM\\\/TCM internal temperature sensor \\\"A\\\" circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png\",\"contentUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png\",\"width\":1200,\"height\":675,\"caption\":\"P0669 OBD2: PCM\\\/ECM\\\/TCM Internal Temperature Sensor \\\"A\\\" Circuit High\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0669 OBD2: PCM\\\/ECM\\\/TCM Internal Temperature Sensor &#8220;A&#8221; Circuit High\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/\",\"name\":\"eManualOnline Blog\",\"description\":\"Free Tips on Car Service, Repair and General Stuff\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\",\"name\":\"eManualOnline\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/cdm.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/04\\\/LOGO-NEW.png\",\"contentUrl\":\"https:\\\/\\\/cdm.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/04\\\/LOGO-NEW.png\",\"width\":512,\"height\":82,\"caption\":\"eManualOnline\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/EmanualOnline\\\/\",\"https:\\\/\\\/x.com\\\/eManualOnline\",\"https:\\\/\\\/www.instagram.com\\\/emanual.online\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/emanualonline\",\"https:\\\/\\\/www.pinterest.com\\\/emanualonline\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/person\\\/e803434ab3cc70008b22b56253223403\",\"name\":\"JC Landry\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/07\\\/Jee-150x150.jpg\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/07\\\/Jee-150x150.jpg\",\"contentUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2020\\\/07\\\/Jee-150x150.jpg\",\"caption\":\"JC Landry\"},\"description\":\"JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of\u00a0TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. 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\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"OBD2 Code P0669 \u2013 Causes, Symptoms, and Repairs","description":"Learn all about the P0669 code, what causes PCM\/ECM\/TCM internal temperature sensor \"A\" circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high","og_locale":"en_US","og_type":"article","og_title":"P0669 OBD2: PCM\/ECM\/TCM Internal Temperature Sensor \"A\" Circuit High","og_description":"The P0669 OBD-II code indicates an issue with the temperature sensor circuit within the Powertrain Control Module (PCM), Engine Control Module (ECM), or","og_url":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high","og_site_name":"eManualOnline Blog","article_publisher":"https:\/\/www.facebook.com\/EmanualOnline\/","article_author":"https:\/\/www.facebook.com\/jee514","article_published_time":"2025-08-25T18:19:20+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png","type":"image\/png"}],"author":"JC Landry","twitter_card":"summary_large_image","twitter_creator":"@eManualOnline","twitter_site":"@eManualOnline","twitter_misc":{"Written by":"JC Landry","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#article","isPartOf":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high"},"author":{"name":"JC Landry","@id":"https:\/\/www.emanualonline.com\/blog\/#\/schema\/person\/e803434ab3cc70008b22b56253223403"},"headline":"P0669 OBD2: PCM\/ECM\/TCM Internal Temperature Sensor &#8220;A&#8221; Circuit High","datePublished":"2025-08-25T18:19:20+00:00","mainEntityOfPage":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high"},"wordCount":413,"commentCount":0,"publisher":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage"},"thumbnailUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png","articleSection":["P Codes - OBD2 Powertrain Codes"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#respond"]}],"copyrightYear":"2025","copyrightHolder":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"}},{"@type":"WebPage","@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high","url":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high","name":"OBD2 Code P0669 \u2013 Causes, Symptoms, and Repairs","isPartOf":{"@id":"https:\/\/www.emanualonline.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage"},"thumbnailUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png","datePublished":"2025-08-25T18:19:20+00:00","description":"Learn all about the P0669 code, what causes PCM\/ECM\/TCM internal temperature sensor \"A\" circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.","breadcrumb":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#primaryimage","url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png","contentUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png","width":1200,"height":675,"caption":"P0669 OBD2: PCM\/ECM\/TCM Internal Temperature Sensor \"A\" Circuit High"},{"@type":"BreadcrumbList","@id":"https:\/\/www.emanualonline.com\/blog\/p0669-obd2-pcm-ecm-tcm-internal-temperature-sensor-a-circuit-high#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.emanualonline.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P0669 OBD2: PCM\/ECM\/TCM Internal Temperature Sensor &#8220;A&#8221; Circuit High"}]},{"@type":"WebSite","@id":"https:\/\/www.emanualonline.com\/blog\/#website","url":"https:\/\/www.emanualonline.com\/blog\/","name":"eManualOnline Blog","description":"Free Tips on Car Service, Repair and General Stuff","publisher":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.emanualonline.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.emanualonline.com\/blog\/#organization","name":"eManualOnline","url":"https:\/\/www.emanualonline.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.emanualonline.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/cdm.emanualonline.com\/blog\/wp-content\/uploads\/2021\/04\/LOGO-NEW.png","contentUrl":"https:\/\/cdm.emanualonline.com\/blog\/wp-content\/uploads\/2021\/04\/LOGO-NEW.png","width":512,"height":82,"caption":"eManualOnline"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/EmanualOnline\/","https:\/\/x.com\/eManualOnline","https:\/\/www.instagram.com\/emanual.online\/","https:\/\/www.linkedin.com\/company\/emanualonline","https:\/\/www.pinterest.com\/emanualonline\/"]},{"@type":"Person","@id":"https:\/\/www.emanualonline.com\/blog\/#\/schema\/person\/e803434ab3cc70008b22b56253223403","name":"JC Landry","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2020\/07\/Jee-150x150.jpg","url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2020\/07\/Jee-150x150.jpg","contentUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2020\/07\/Jee-150x150.jpg","caption":"JC Landry"},"description":"JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of\u00a0TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. 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\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0669-obd2-pcmecmtcm-internal-temperature-sensor-a-circuit-high-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 P0669 OBD-II code indicates an issue with the temperature sensor circuit within the Powertrain Control Module (PCM), Engine Control Module (ECM), or Transmission Control Module (TCM). This code is triggered when the module detects that the internal temperature sensor is reporting a high voltage condition, which can prevent the module from functioning correctly. What&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78011","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=78011"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78011\/revisions"}],"predecessor-version":[{"id":84710,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78011\/revisions\/84710"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/93782"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=78011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=78011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=78011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}