{"id":77325,"date":"2025-09-12T13:59:15","date_gmt":"2025-09-12T18:59:15","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=77325"},"modified":"2025-09-12T14:08:44","modified_gmt":"2025-09-12T19:08:44","slug":"p0177-obd2-fuel-composition-sensor-circuit-range-performance","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance","title":{"rendered":"P0177 OBD2: Fuel Composition Sensor Circuit Range\/Performance"},"content":{"rendered":"<h2>What Does the P0177 Code Mean?<\/h2>\n<p>The P0177 code indicates that the fuel composition sensor circuit is experiencing a range or performance issue. Primarily, it affects vehicles equipped with a fuel composition sensor that can process varying levels of ethanol in fuels, such as Flex Fuel or E85.<\/p>\n<h2>What Causes the P0177 Code?<\/h2>\n<p>Several factors can trigger the P0177 code, including:<\/p>\n<ul>\n<li>Fuel composition sensor failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Powertrain Control Module (PCM) software needs to be updated<\/li>\n<li>Wiring issues within the sensor circuit<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0177 Code?<\/h2>\n<p>If your vehicle is generating a P0177 code, you may experience the following symptoms:<\/p>\n<ul>\n<li>Decreased engine performance<\/li>\n<li>Engine may not start<\/li>\n<li>Increased fuel consumption<\/li>\n<\/ul>\n<h2>How Serious Is the P0177 Code?<\/h2>\n<p>The P0177 code is classified as urgent. It indicates significant malfunctions that can lead to severe vehicle damage or pose safety risks to the driver and passengers. Therefore, prompt action is necessary when this code is detected.<\/p>\n<h2>How to Diagnose the P0177 Code<\/h2>\n<p>Diagnosing the P0177 code typically involves the following steps:<\/p>\n<ol>\n<li>Using an OBD-II scanner to confirm the code.<\/li>\n<li>Inspecting the fuel composition sensor and its wiring for any visible damage.<\/li>\n<li>Checking the PCM for software updates or faults.<\/li>\n<li>Conducting a test of the fuel composition sensor to ensure it\u2019s operating within the correct range.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0177 Code<\/h2>\n<p>Repairs for the P0177 code may include:<\/p>\n<ul>\n<li>Replacing the fuel composition sensor<\/li>\n<li>Repairing or replacing damaged wiring<\/li>\n<li>Updating the PCM software<\/li>\n<li>Replacing the PCM if it is determined to be faulty<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0177 Code?<\/h2>\n<p>The cost to repair the P0177 code can vary significantly based on the underlying issue. On average, repairs can range from $100 to $800, depending on whether it involves simple wiring fixes or a complete PCM replacement.<\/p>\n<h2>Can I Fix the P0177 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may attempt to fix the P0177 code themselves, it\u2019s important to note that proper diagnosis and repair require a thorough understanding of automotive systems. If you are not experienced in automotive repair, it is advisable to seek professional help to avoid unnecessary repairs and ensure safety.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P0177 Code Mean? The P0177 code indicates that the fuel composition sensor circuit is experiencing a range or performance issue. Primarily, it affects vehicles equipped with a fuel composition sensor that can process varying levels of ethanol in fuels, such as Flex Fuel or E85. What Causes the P0177 Code? Several factors &hellip;<\/p>\n","protected":false},"author":26,"featured_media":95724,"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-77325","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 P0177 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0177 code, what causes fuel composition sensor circuit range\/performance issues, and how to diagnose and fix common problems 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\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0177 OBD2: Fuel Composition Sensor Circuit Range\/Performance\" \/>\n<meta property=\"og:description\" content=\"What Does the P0177 Code Mean? The P0177 code indicates that the fuel composition sensor circuit is experiencing a range or performance issue. Primarily,\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\" \/>\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=\"2025-09-12T18:59:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-12T19:08:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.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\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\"},\"author\":{\"name\":\"JC Landry\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#\\\/schema\\\/person\\\/e803434ab3cc70008b22b56253223403\"},\"headline\":\"P0177 OBD2: Fuel Composition Sensor Circuit Range\\\/Performance\",\"datePublished\":\"2025-09-12T18:59:15+00:00\",\"dateModified\":\"2025-09-12T19:08:44+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\"},\"wordCount\":368,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png\",\"articleSection\":[\"P Codes - OBD2 Powertrain Codes\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\",\"name\":\"OBD2 Code P0177 \u2013 Causes, Symptoms, and Repairs\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png\",\"datePublished\":\"2025-09-12T18:59:15+00:00\",\"dateModified\":\"2025-09-12T19:08:44+00:00\",\"description\":\"Learn all about the P0177 code, what causes fuel composition sensor circuit range\\\/performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage\",\"url\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png\",\"contentUrl\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png\",\"width\":1200,\"height\":675,\"caption\":\"P0177 OBD2: Fuel Composition Sensor Circuit Range\\\/Performance\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.emanualonline.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0177 OBD2: Fuel Composition Sensor Circuit Range\\\/Performance\"}]},{\"@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 P0177 \u2013 Causes, Symptoms, and Repairs","description":"Learn all about the P0177 code, what causes fuel composition sensor circuit range\/performance issues, and how to diagnose and fix common problems 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\/p0177-obd2-fuel-composition-sensor-circuit-range-performance","og_locale":"en_US","og_type":"article","og_title":"P0177 OBD2: Fuel Composition Sensor Circuit Range\/Performance","og_description":"What Does the P0177 Code Mean? The P0177 code indicates that the fuel composition sensor circuit is experiencing a range or performance issue. Primarily,","og_url":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance","og_site_name":"eManualOnline Blog","article_publisher":"https:\/\/www.facebook.com\/EmanualOnline\/","article_author":"https:\/\/www.facebook.com\/jee514","article_published_time":"2025-09-12T18:59:15+00:00","article_modified_time":"2025-09-12T19:08:44+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.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\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#article","isPartOf":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance"},"author":{"name":"JC Landry","@id":"https:\/\/www.emanualonline.com\/blog\/#\/schema\/person\/e803434ab3cc70008b22b56253223403"},"headline":"P0177 OBD2: Fuel Composition Sensor Circuit Range\/Performance","datePublished":"2025-09-12T18:59:15+00:00","dateModified":"2025-09-12T19:08:44+00:00","mainEntityOfPage":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance"},"wordCount":368,"commentCount":0,"publisher":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage"},"thumbnailUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png","articleSection":["P Codes - OBD2 Powertrain Codes"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#respond"]}],"copyrightYear":"2025","copyrightHolder":{"@id":"https:\/\/www.emanualonline.com\/blog\/#organization"}},{"@type":"WebPage","@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance","url":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance","name":"OBD2 Code P0177 \u2013 Causes, Symptoms, and Repairs","isPartOf":{"@id":"https:\/\/www.emanualonline.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage"},"image":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage"},"thumbnailUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png","datePublished":"2025-09-12T18:59:15+00:00","dateModified":"2025-09-12T19:08:44+00:00","description":"Learn all about the P0177 code, what causes fuel composition sensor circuit range\/performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.","breadcrumb":{"@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#primaryimage","url":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png","contentUrl":"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png","width":1200,"height":675,"caption":"P0177 OBD2: Fuel Composition Sensor Circuit Range\/Performance"},{"@type":"BreadcrumbList","@id":"https:\/\/www.emanualonline.com\/blog\/p0177-obd2-fuel-composition-sensor-circuit-range-performance#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.emanualonline.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P0177 OBD2: Fuel Composition Sensor Circuit Range\/Performance"}]},{"@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\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png",1200,675,false],"thumbnail":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-150x150.png",150,150,true],"medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-300x169.png",300,169,true],"medium_large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-768x432.png",618,348,true],"large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-1024x576.png",618,348,true],"1536x1536":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png",1200,675,false],"2048x2048":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance.png",1200,675,false],"tie-small":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-110x75.png",110,75,true],"tie-medium":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-403x215.png",403,215,true],"tie-large":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-310x205.png",310,205,true],"slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-660x330.png",660,330,true],"big-slider":["https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/09\/p0177-obd2-fuel-composition-sensor-circuit-rangeperformance-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":"What Does the P0177 Code Mean? The P0177 code indicates that the fuel composition sensor circuit is experiencing a range or performance issue. Primarily, it affects vehicles equipped with a fuel composition sensor that can process varying levels of ethanol in fuels, such as Flex Fuel or E85. What Causes the P0177 Code? Several factors&hellip;","_links":{"self":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/77325","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=77325"}],"version-history":[{"count":3,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/77325\/revisions"}],"predecessor-version":[{"id":95748,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/posts\/77325\/revisions\/95748"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media\/95724"}],"wp:attachment":[{"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/media?parent=77325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/categories?post=77325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.emanualonline.com\/blog\/wp-json\/wp\/v2\/tags?post=77325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}