{"id":516903,"date":"2025-12-09T20:32:40","date_gmt":"2025-12-10T01:32:40","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/"},"modified":"2026-08-25T16:10:10","modified_gmt":"2026-08-25T20:10:10","slug":"dtc-c0031-left-front-wheel-speed-sensor","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/","title":{"rendered":"C0031 Code Symptoms, Causes, and Repair Guide for Technicians"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">C0031<\/div>\n<h1>C0031 Code Symptoms, Causes, and Repair Guide for Technicians<\/h1>\n<p class=\"hero-subtitle\">\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>C0031 signals a fault with the left\u2011front wheel\u2011speed sensor circuit. <\/li>\n<li>Typical driver alerts: ABS\/ESC warning lamp, intermittent ABS activation, loss of traction\u2011control function. <\/li>\n<li>Primary causes: sensor signal loss, damaged wiring\/connectors, or ABS\/ESC control\u2011module communication failure. <\/li>\n<li>Diagnosis: scan for C0031, verify sensor voltage, perform module communication test, and inspect wiring. <\/li>\n<li>Replacement: when the ABS\/ESC control module repeatedly fails communication or shows internal faults; Flagship One supplies VIN\u2011matched, pre\u2011programmed modules. <\/li>\n<\/ul>\n<\/div>\n<h3>How to Diagnose and Fix a C0031 Code <\/h3>\n<p>Drivers notice the ABS or ESC warning light flashing on the dash, sometimes accompanied by a brief pulsation of the brake pedal when the system tries to intervene. The vehicle may also display a \u201csensor fault\u201d message. These alerts appear because the anti\u2011lock braking system cannot obtain a reliable speed reading from the left\u2011front wheel, which is essential for modulating brake pressure during hard stops or slippery conditions. Early identification prevents loss of traction\u2011control assistance and avoids unexpected ABS engagement while driving. <\/p>\n<h3>Symptoms <\/h3>\n<ul>\n<li><strong>ABS\/ESC warning lamp illuminated<\/strong> (steady or flashing). <\/li>\n<li><strong>Intermittent ABS activation<\/strong> on dry pavement or during light braking. <\/li>\n<li><strong>Traction\u2011control disengagement<\/strong> indicated by a TC or ESC light. <\/li>\n<li><strong>Pulsing brake\u2011pedal feel<\/strong> when the system attempts to modulate pressure without a valid wheel\u2011speed signal. <\/li>\n<li><strong>\u201cLeft Front Wheel\u2011Speed Sensor Fault\u201d<\/strong> message on the instrument cluster, if equipped. <\/li>\n<\/ul>\n<div style=\"margin:36px 0;padding:46px 26px;background:#102844 url(https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/fs1-engine-computer-collage-bg-1.webp) center\/cover no-repeat;border-radius:12px;text-align:center\">\n<p style=\"margin:0 0 10px;color:#ffd27a;font-size:14px;letter-spacing:2px;text-transform:uppercase\">DTC C0031 &middot; ABS control module<\/p>\n<p style=\"margin:0 auto 22px;max-width:560px;color:#ffffff;font-size:22px;font-weight:700;line-height:1.35\">OEM replacements \u2014 tested and ready to install.<\/p>\n<p><a href=\"https:\/\/www.fs1inc.com\/abs-brake.html?ref=blog-cta-dtc\" style=\"display:inline-block;background:#f0ad2d;color:#102844;font-weight:700;padding:14px 34px;border-radius:8px;text-decoration:none;font-size:16px\">Find yours by year, make &amp; model &rarr;<\/a><\/p>\n<p style=\"margin:14px 0 0;color:#c3d0dd;font-size:13px\">Free shipping &middot; Lifetime warranty<\/p>\n<\/div>\n<p>These signs are typically the first indication that the left\u2011front wheel\u2011speed sensor circuit is compromised. <\/p>\n<h3>Why Wheel\u2011Speed Sensor Problems Occur <\/h3>\n<h4>Faulty Sensor Signal <\/h4>\n<p>The wheel\u2011speed sensor generates a sinusoidal voltage proportional to wheel rotation. A shorted or open sensor coil, or internal coil degradation, can drop the signal below the threshold the ABS\/ESC module requires, triggering C0031. <\/p>\n<h4>Damaged Wiring or Connectors <\/h4>\n<p>The sensor\u2019s harness runs through the wheel well, exposed to heat, moisture, and vibration. Pinched wires, corroded terminals, or broken pins interrupt the signal path, producing the same fault code even when the sensor itself is functional. <\/p>\n<h4>ABS\/ESC Control\u2011Module Communication Failure <\/h4>\n<p>The ABS\/ESC control module receives the sensor\u2019s pulse train via the CAN bus. If the module\u2019s internal processor or its CAN transceiver is damaged, it may misinterpret a valid sensor signal as absent, setting C0031. This scenario often coincides with other communication\u2011related codes (e.g., C0035, C0040). <\/p>\n<h4>Water Intrusion or Corrosion <\/h4>\n<p>Wheel\u2011well splash guards can fail, allowing road\u2011spray or snow melt to reach the sensor and its connector. Moisture creates intermittent shorts, leading to erratic sensor readings and false fault codes. <\/p>\n<h4>Software or Calibration Issues <\/h4>\n<p>After major ECU updates or after replacing related modules, the ABS\/ESC firmware may require recalibration of sensor thresholds. An uncalibrated module can reject a perfectly good sensor signal, generating C0031 until the calibration routine is completed. <\/p>\n<h3>Diagnostic and Repair Procedures <\/h3>\n<ol>\n<li><strong>Read and Confirm the Code<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Connect a scan tool capable of ABS\/ESC diagnostics. Verify that C0031 is present and note any additional codes. <\/p>\n<ol>\n<li><strong>Visual Inspection<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Examine the left\u2011front wheel\u2011speed sensor, wiring harness, and connector for cracks, corrosion, or pinched sections. <\/p>\n<p> &#8211; Clean the connector with electrical contact cleaner and reseat it firmly. <\/p>\n<ol>\n<li><strong>Signal Test<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Using a multimeter or oscilloscope, measure sensor voltage while rotating the wheel (or lift the vehicle and spin the tire). <\/p>\n<p> &#8211; A healthy sensor typically produces 0.5 V to 5 V AC at low speeds, increasing with RPM. Absence of signal suggests sensor or wiring failure. <\/p>\n<ol>\n<li><strong>Wiring Continuity Check<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Perform a resistance check between sensor leads and the connector pins. Open circuits (&gt;10 k\u03a9) indicate broken wires; very low resistance (&lt;10 \u03a9) may reveal a short to ground. <\/p>\n<ol>\n<li><strong>Module Communication Test<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; With the scan tool, initiate a \u201cCAN bus integrity\u201d or \u201cmodule self\u2011test.\u201d <\/p>\n<p> &#8211; If the ABS\/ESC module reports a communication error despite a valid sensor signal, the fault likely resides in the module itself. <\/p>\n<ol>\n<li><strong>Re\u2011programming \/ Calibration<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; If the module passes hardware tests, execute the manufacturer\u2019s wheel\u2011speed sensor calibration routine. This updates sensor thresholds and can clear C0031 if the issue was software\u2011related. <\/p>\n<ol>\n<li><strong>Component Replacement<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; <strong>Sensor or Wiring<\/strong>: Replace only after confirming a hardware fault. <\/p>\n<p> &#8211; <strong>ABS\/ESC Control Module<\/strong>: When the module fails communication tests or repeatedly sets C0031 after repairs, replace the module. <\/p>\n<ol>\n<li><strong>Final Verification<\/strong>\n<\/li>\n<\/ol>\n<p> &#8211; Clear all codes, road\u2011test the vehicle, and re\u2011scan to ensure C0031 does not return. <\/p>\n<p><strong>Cost Estimates<\/strong> <\/p>\n<ul>\n<li>Diagnostic scan and sensor signal test: <strong>$80\u2011$120<\/strong> labor. <\/li>\n<li>Wiring repair or connector cleaning: <strong>$50\u2011$150<\/strong> parts\/labor. <\/li>\n<li>ABS\/ESC module replacement (OEM\u2011equivalent): <strong>$600\u2011$900<\/strong> for the unit, plus <strong>$150\u2011$250<\/strong> labor. <\/li>\n<li>Programming\/re\u2011calibration of a new module: <strong>$100\u2011$150<\/strong>. <\/li>\n<\/ul>\n<h3>When Wheel\u2011Speed Sensor Replacement Makes More Sense Than Repair <\/h3>\n<p>If the ABS\/ESC control module repeatedly fails communication tests, exhibits internal error counters, or has suffered water\u2011induced corrosion, repair attempts often provide only a temporary fix. In such cases, installing a new, VIN\u2011matched module eliminates the risk of recurring faults and restores full system integrity. <\/p>\n<p><strong>Flagship One<\/strong> specializes in VIN\u2011matched control modules, delivering units that are pre\u2011programmed to your vehicle\u2019s exact specifications. Modern control modules integrate security, immobilizer, and CAN\u2011bus functions, so correct programming is essential. A Flagship One replacement ensures plug\u2011and\u2011drive compatibility, comes with a warranty, and eliminates the need for dealer\u2011level re\u2011coding delays. <\/p>\n<h3>Preventive Maintenance <\/h3>\n<ul>\n<li><strong>Protect Wiring<\/strong>: Routinely inspect the wheel\u2011well harness for chafing. Apply heat\u2011shrink tubing or protective sleeves where the harness contacts metal edges. <\/li>\n<li><strong>Keep Connectors Dry<\/strong>: Verify that splash guards are intact and that the sensor\u2019s connector boots are sealed after each wash or winter service. <\/li>\n<li><strong>Periodic Scans<\/strong>: Include ABS\/ESC codes in regular OBD\u2011II scans (every 6 000 mi) to catch intermittent faults before they trigger a warning lamp. <\/li>\n<li><strong>Software Updates<\/strong>: When a manufacturer releases ABS\/ESC firmware revisions, have a qualified technician apply the update and run the sensor calibration routine. <\/li>\n<li><strong>Avoid Impact Damage<\/strong>: Hitting potholes or curbs can bend the sensor ring or fracture the wiring; address any impact\u2011related damage promptly.<\/li>\n<\/ul>\n<div class=\"info-section\">\n<p><strong>Service Recommendation:<\/strong> Most issues related to this fault are diagnosed and corrected through inspection, wiring repair, and calibration rather than module replacement. For modules not typically replaced through aftermarket suppliers, diagnosis and repair should be performed by a certified automotive technician with access to factory service information and tooling.<\/p>\n<\/div>\n<div class=\"content-section\">\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-question\">1. What does the C0031 code mean for my vehicle\u2019s safety?<\/div>\n<div class=\"faq-answer\">\n<p>C0031 indicates the ABS\/ESC system cannot verify wheel speed at the left front. While the vehicle can still be driven, traction\u2011control and ABS functions are compromised, increasing stopping distance on slippery surfaces. Immediate diagnosis is recommended.<\/p>\n<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-question\">2. Can I clear the C0031 code by resetting the ABS light?<\/div>\n<div class=\"faq-answer\">\n<p>Clearing the code without addressing the underlying fault will cause it to return. The scan tool may erase the code temporarily, but the ABS\/ESC module will set C0031 again if the sensor signal or module communication remains invalid.<\/p>\n<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-question\">3. How much does an ABS\/ESC control\u2011module replacement cost?<\/div>\n<div class=\"faq-answer\">\n<p>A replacement unit typically ranges from **$600 to $900**, with labor between **$150 and $250**. Prices vary by vehicle make, model year, and required programming.<\/p>\n<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-question\">4. Is sensor replacement ever necessary, or is the module always the culprit?<\/div>\n<div class=\"faq-answer\">\n<p>Both can be responsible. A broken sensor or damaged wire will generate the same code as a faulty module. Proper diagnostics\u2014signal testing and module communication checks\u2014determine which component requires attention.<\/p>\n<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-question\">5. Will a VIN\u2011matched module from Flagship One work without dealer programming?<\/div>\n<div class=\"faq-answer\">\n<p>Flagship One provides modules that are pre\u2011programmed to the vehicle\u2019s VIN and software version. After physical installation, the module is ready for operation, and only a brief verification scan is needed.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Your vehicle\u2019s ABS light and uneven braking point to a C0031 left\u2011front wheel\u2011speed sensor fault, risking traction control loss. Scan and replace now.<\/p>\n","protected":false},"author":1,"featured_media":546034,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4,1634],"tags":[],"class_list":["post-516903","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-auto-news","category-trouble-codes"],"acf":{"sku":"","year":"","make":"","model":"","post_title":"","featured_image":null,"introduction":"","what_is_pcm_programming":"","signs_your_year_make_model_needs_pcm_programming":"","product_title":"","product_view_link":"","how_pcm_programming_works_for_year_make_model":"","engine_size":"","engine_size_1_url":"","engine_size_2":"","engine_size_2_url":"","description":"","body_reported_problems":"","body_analysis":"","brake_system_reported_problems":"","brake_system_analysis":"","heating_&_cooling_reported_problems":"","heating_&_cooling_analysis":"","drivetrain_reported_problems":"","drivetrain_reported_analysis":"","interior_electronics_reported_problems":"","interior_electronics_analysis":"","cooling_system_reported_problems":"","cooling_system_analysis":"","ignition_&_wiring_reported_problems":"","ignition_&_wiring_analysis":"","engine_repairs_reported_problems":"","engine_repairs_analysis":"","exhaust_system_reported_problems":"","exhaust_system_analysis":"","fuel_&_emissions_reported_problems":"","fuel_&_emissions_analysis":"","onboard_electronics_reported_problems":"","onboard_electronics_analysis":"","strange_sounds_&_leaks_reported_problems":"","strange_sounds_&_leaks_analysis":"","exterior_finish_reported_problems":"","exterior_finish_analysis":"","suspension_&_steering_reported_problems":"","suspension_&_steering_analysis":"","transmission_repairs_reported_problems":"","transmission_repairs_analysis":"","conclusion":"","image":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C0031 Code Symptoms, Causes, and Repair Guide for Technicians<\/title>\n<meta name=\"description\" content=\"C0031 troubleshooting guide - causes, symptoms, and repair options. Straight answers from the engine computer specialists at Flagship One.\" \/>\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.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C0031 Code Symptoms, Causes, and Repair Guide for Technicians\" \/>\n<meta property=\"og:description\" content=\"C0031 troubleshooting guide - causes, symptoms, and repair options. Straight answers from the engine computer specialists at Flagship One.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/\" \/>\n<meta property=\"og:site_name\" content=\"Flagship One Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/flagshipone\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/flagshipone\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-10T01:32:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-25T20:10:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/dtc-c0031-guide-diagram.webp\" \/>\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\/webp\" \/>\n<meta name=\"author\" content=\"FlagshipOne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@theflagshipone\" \/>\n<meta name=\"twitter:site\" content=\"@theflagshipone\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"FlagshipOne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"C0031 Code Symptoms, Causes, and Repair Guide for Technicians\",\"datePublished\":\"2025-12-10T01:32:40+00:00\",\"dateModified\":\"2026-08-25T20:10:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/\"},\"wordCount\":1318,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/dtc-c0031-guide-diagram.webp\",\"articleSection\":[\"Auto News\",\"Trouble Codes\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/\",\"name\":\"C0031 Code Symptoms, Causes, and Repair Guide for Technicians\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/dtc-c0031-guide-diagram.webp\",\"datePublished\":\"2025-12-10T01:32:40+00:00\",\"dateModified\":\"2026-08-25T20:10:10+00:00\",\"description\":\"C0031 troubleshooting guide - causes, symptoms, and repair options. Straight answers from the engine computer specialists at Flagship One.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/dtc-c0031-guide-diagram.webp\",\"contentUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/dtc-c0031-guide-diagram.webp\",\"width\":1200,\"height\":675,\"caption\":\"C0031 diagnostic trouble code guide\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-c0031-left-front-wheel-speed-sensor\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"C0031 Code Symptoms, Causes, and Repair Guide for Technicians\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\",\"name\":\"Flagship One Blog\",\"description\":\"Flagship One Inc. OEM Engine Computers  Control Modules\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\",\"name\":\"Flagship One, Inc.\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2019\\\/06\\\/web-lg-fs1-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2019\\\/06\\\/web-lg-fs1-logo.png\",\"width\":1341,\"height\":1098,\"caption\":\"Flagship One, Inc.\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/flagshipone\",\"https:\\\/\\\/x.com\\\/theflagshipone\",\"https:\\\/\\\/www.instagram.com\\\/flagship_one\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UC0oyKphffBM2qkJ-gKPmMXw\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\",\"name\":\"FlagshipOne\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g\",\"caption\":\"FlagshipOne\"},\"description\":\"The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.\",\"sameAs\":[\"https:\\\/\\\/www.fs1inc.com\\\/\",\"https:\\\/\\\/www.facebook.com\\\/flagshipone\\\/\",\"https:\\\/\\\/www.instagram.com\\\/flagship_one\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/fs1inc\"],\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/author\\\/flagship1inc\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"C0031 Code Symptoms, Causes, and Repair Guide for Technicians","description":"C0031 troubleshooting guide - causes, symptoms, and repair options. Straight answers from the engine computer specialists at Flagship One.","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.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/","og_locale":"en_US","og_type":"article","og_title":"C0031 Code Symptoms, Causes, and Repair Guide for Technicians","og_description":"C0031 troubleshooting guide - causes, symptoms, and repair options. Straight answers from the engine computer specialists at Flagship One.","og_url":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/","og_site_name":"Flagship One Blog","article_publisher":"https:\/\/www.facebook.com\/flagshipone","article_author":"https:\/\/www.facebook.com\/flagshipone\/","article_published_time":"2025-12-10T01:32:40+00:00","article_modified_time":"2026-08-25T20:10:10+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/dtc-c0031-guide-diagram.webp","type":"image\/webp"}],"author":"FlagshipOne","twitter_card":"summary_large_image","twitter_creator":"@theflagshipone","twitter_site":"@theflagshipone","twitter_misc":{"Written by":"FlagshipOne","Est. reading time":"7 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#article","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/"},"author":{"name":"FlagshipOne","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700"},"headline":"C0031 Code Symptoms, Causes, and Repair Guide for Technicians","datePublished":"2025-12-10T01:32:40+00:00","dateModified":"2026-08-25T20:10:10+00:00","mainEntityOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/"},"wordCount":1318,"commentCount":0,"publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/dtc-c0031-guide-diagram.webp","articleSection":["Auto News","Trouble Codes"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/","url":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/","name":"C0031 Code Symptoms, Causes, and Repair Guide for Technicians","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#primaryimage"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/dtc-c0031-guide-diagram.webp","datePublished":"2025-12-10T01:32:40+00:00","dateModified":"2026-08-25T20:10:10+00:00","description":"C0031 troubleshooting guide - causes, symptoms, and repair options. Straight answers from the engine computer specialists at Flagship One.","breadcrumb":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#primaryimage","url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/dtc-c0031-guide-diagram.webp","contentUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/08\/dtc-c0031-guide-diagram.webp","width":1200,"height":675,"caption":"C0031 diagnostic trouble code guide"},{"@type":"BreadcrumbList","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-c0031-left-front-wheel-speed-sensor\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.fs1inc.com\/blog\/"},{"@type":"ListItem","position":2,"name":"C0031 Code Symptoms, Causes, and Repair Guide for Technicians"}]},{"@type":"WebSite","@id":"https:\/\/www.fs1inc.com\/blog\/#website","url":"https:\/\/www.fs1inc.com\/blog\/","name":"Flagship One Blog","description":"Flagship One Inc. OEM Engine Computers  Control Modules","publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.fs1inc.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.fs1inc.com\/blog\/#organization","name":"Flagship One, Inc.","url":"https:\/\/www.fs1inc.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2019\/06\/web-lg-fs1-logo.png","contentUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2019\/06\/web-lg-fs1-logo.png","width":1341,"height":1098,"caption":"Flagship One, Inc."},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/flagshipone","https:\/\/x.com\/theflagshipone","https:\/\/www.instagram.com\/flagship_one","https:\/\/www.youtube.com\/channel\/UC0oyKphffBM2qkJ-gKPmMXw"]},{"@type":"Person","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700","name":"FlagshipOne","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/351b81e51993825aea73280c48061a7205fdd2189730ebbdee5d63894c5cebb4?s=96&d=mm&r=g","caption":"FlagshipOne"},"description":"The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.","sameAs":["https:\/\/www.fs1inc.com\/","https:\/\/www.facebook.com\/flagshipone\/","https:\/\/www.instagram.com\/flagship_one\/","https:\/\/www.linkedin.com\/company\/fs1inc"],"url":"https:\/\/www.fs1inc.com\/blog\/author\/flagship1inc\/"}]}},"_links":{"self":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/516903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/comments?post=516903"}],"version-history":[{"count":3,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/516903\/revisions"}],"predecessor-version":[{"id":565256,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/516903\/revisions\/565256"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/media\/546034"}],"wp:attachment":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/media?parent=516903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/categories?post=516903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/tags?post=516903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}