{"id":78213,"date":"2025-08-21T13:18:20","date_gmt":"2025-08-21T18:18:20","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=78213"},"modified":"2025-08-21T13:18:20","modified_gmt":"2025-08-21T18:18:20","slug":"p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal","title":{"rendered":"P077A OBD2: Output Speed Sensor Circuit &#8211; Loss of Direction Signal"},"content":{"rendered":"<p>The P077A OBD-II code indicates a problem with the Output Speed Sensor Circuit, specifically a loss of direction signal. This code is critical as it relates to the functioning of the vehicle&#8217;s transmission.<\/p>\n<h2>What Does the P077A Code Mean?<\/h2>\n<p>The P077A code is set when the Transmission Control Module (TCM) receives an implausible signal from the Output Speed Sensor. This sensor tracks how fast the output shaft of the transmission is spinning, enabling the TCM to verify whether the correct gear is engaged. A secondary sensor may also be present to determine the rotation direction of the shaft.<\/p>\n<h2>What Causes the P077A Code?<\/h2>\n<p>Several issues can trigger the P077A code, including:<\/p>\n<ul>\n<li>High voltage control module failure<\/li>\n<li>Output shaft speed sensor failure<\/li>\n<li>Transmission Control Module (TCM) failure<\/li>\n<li>Wiring issues<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P077A Code?<\/h2>\n<p>When the P077A code is present, you may experience:<\/p>\n<ul>\n<li>Transmission may not shift properly<\/li>\n<li>Increased fuel consumption<\/li>\n<\/ul>\n<h2>How Serious Is the P077A Code?<\/h2>\n<p>The P077A code is classified as urgent. It indicates significant malfunctions that could lead to severe vehicle damage or jeopardize the safety of the driver and passengers. Immediate action is recommended.<\/p>\n<h2>How to Diagnose the P077A Code<\/h2>\n<p>Diagnosing the P077A code involves:<\/p>\n<ul>\n<li>Using an OBD-II scanner to confirm the P077A code and check for additional codes.<\/li>\n<li>Inspecting the wiring and connectors associated with the Output Speed Sensor and TCM.<\/li>\n<li>Testing the Output Speed Sensor and TCM for proper functionality.<\/li>\n<\/ul>\n<h2>Common Repairs for the P077A Code<\/h2>\n<p>Common repairs associated with the P077A code may include:<\/p>\n<ul>\n<li>Replacing the Output Speed Sensor<\/li>\n<li>Repairing or replacing damaged wiring or connectors<\/li>\n<li>Reprogramming or replacing the Transmission Control Module (TCM)<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P077A Code?<\/h2>\n<p>The cost to fix the P077A code can vary widely depending on the specific issue. On average, repairs may range from $100 to $1,000, taking into account parts and labor costs. Sensor replacement is typically less expensive, while TCM replacement can be on the higher end.<\/p>\n<h2>Can I Fix the P077A Code Myself?<\/h2>\n<p>While some experienced DIY mechanics may be able to address issues related to the P077A code, it is crucial to understand that proper diagnosis is essential. Replacing a sensor without addressing underlying issues may not resolve the problem. If in doubt, seeking professional assistance is recommended.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The P077A OBD-II code indicates a problem with the Output Speed Sensor Circuit, specifically a loss of direction signal. This code is critical as it relates to the functioning of the vehicle&#8217;s transmission. What Does the P077A Code Mean? The P077A code is set when the Transmission Control Module (TCM) receives an implausible signal from &hellip;<\/p>\n","protected":false},"author":26,"featured_media":93238,"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-78213","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 P077A \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P077A code, what causes output speed sensor circuit loss of direction signal, 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\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P077A OBD2: Output Speed Sensor Circuit - Loss of Direction Signal\" \/>\n<meta property=\"og:description\" content=\"The P077A OBD-II code indicates a problem with the Output Speed Sensor Circuit, specifically a loss of direction signal. This code is critical as it\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\" \/>\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=\"2025-08-21T18:18:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.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\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\"},\"author\":{\"name\":\"JC Landry\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/person\\\/e803434ab3cc70008b22b56253223403\"},\"headline\":\"P077A OBD2: Output Speed Sensor Circuit &#8211; Loss of Direction Signal\",\"datePublished\":\"2025-08-21T18:18:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\"},\"wordCount\":411,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png\",\"articleSection\":[\"P Codes - OBD2 Powertrain Codes\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\",\"name\":\"OBD2 Code P077A \u2013 Causes, Symptoms, and Repairs\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png\",\"datePublished\":\"2025-08-21T18:18:20+00:00\",\"description\":\"Learn all about the P077A code, what causes output speed sensor circuit loss of direction signal, and how to diagnose and fix common issues to maintain optimal engine performance.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png\",\"contentUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/08\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png\",\"width\":1200,\"height\":675,\"caption\":\"P077A OBD2: Output Speed Sensor Circuit - Loss of Direction Signal\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P077A OBD2: Output Speed Sensor Circuit &#8211; Loss of Direction Signal\"}]},{\"@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 P077A \u2013 Causes, Symptoms, and Repairs","description":"Learn all about the P077A code, what causes output speed sensor circuit loss of direction signal, 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\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal","og_locale":"en_US","og_type":"article","og_title":"P077A OBD2: Output Speed Sensor Circuit - Loss of Direction Signal","og_description":"The P077A OBD-II code indicates a problem with the Output Speed Sensor Circuit, specifically a loss of direction signal. This code is critical as it","og_url":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal","og_site_name":"eManualOnline Blog","article_publisher":"https:\/\/www.facebook.com\/EmanualOnline\/","article_author":"https:\/\/www.facebook.com\/jee514","article_published_time":"2025-08-21T18:18:20+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.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\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#article","isPartOf":{"@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal"},"author":{"name":"JC Landry","@id":"https:\/\/www.emanualonline.com\/blog\/#\/schema\/person\/e803434ab3cc70008b22b56253223403"},"headline":"P077A OBD2: Output Speed Sensor Circuit &#8211; Loss of Direction Signal","datePublished":"2025-08-21T18:18:20+00:00","mainEntityOfPage":{"@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal"},"wordCount":411,"commentCount":0,"publisher":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage"},"thumbnailUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png","articleSection":["P Codes - OBD2 Powertrain Codes"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#respond"]}],"copyrightYear":"2025","copyrightHolder":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"}},{"@type":"WebPage","@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal","url":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal","name":"OBD2 Code P077A \u2013 Causes, Symptoms, and Repairs","isPartOf":{"@id":"https:\/\/www.emanualonline.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage"},"thumbnailUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png","datePublished":"2025-08-21T18:18:20+00:00","description":"Learn all about the P077A code, what causes output speed sensor circuit loss of direction signal, and how to diagnose and fix common issues to maintain optimal engine performance.","breadcrumb":{"@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#primaryimage","url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png","contentUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png","width":1200,"height":675,"caption":"P077A OBD2: Output Speed Sensor Circuit - Loss of Direction Signal"},{"@type":"BreadcrumbList","@id":"https:\/\/www.emanualonline.com\/blog\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.emanualonline.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P077A OBD2: Output Speed Sensor Circuit &#8211; Loss of Direction Signal"}]},{"@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\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p077a-obd2-output-speed-sensor-circuit-loss-of-direction-signal-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 P077A OBD-II code indicates a problem with the Output Speed Sensor Circuit, specifically a loss of direction signal. This code is critical as it relates to the functioning of the vehicle&#8217;s transmission. What Does the P077A Code Mean? The P077A code is set when the Transmission Control Module (TCM) receives an implausible signal from&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78213","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=78213"}],"version-history":[{"count":1,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78213\/revisions"}],"predecessor-version":[{"id":84912,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/78213\/revisions\/84912"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/93238"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=78213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=78213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=78213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}