{"id":517187,"date":"2025-12-10T00:02:34","date_gmt":"2025-12-10T05:02:34","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/"},"modified":"2025-12-10T00:02:34","modified_gmt":"2025-12-10T05:02:34","slug":"dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/","title":{"rendered":"P0039 Code Symptoms, Causes, Diagnosis, Cost &#038; Repair Overview"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">P0039<\/div>\n<h1>P0039 Code Symptoms, Causes, Diagnosis, Cost &amp; Repair Overview<\/h1>\n<p class=\"hero-subtitle\">\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>P0039 indicates a Turbocharger\/Supercharger Bypass Valve A control\u2011circuit range\/performance fault. <\/li>\n<li>Typical signs are reduced boost, fluctuating boost pressure, limp\u2011mode operation, and a illuminated \u201ccheck engine\u201d light. <\/li>\n<li>The ECU detects voltage outside the calibrated window for the bypass valve, often caused by wiring problems, a faulty valve actuator, or a corrupted control module. <\/li>\n<li>Diagnosis starts with a live data scan, voltage verification, and actuator actuation test; repairs usually cost $150\u2011$350 for labor plus any necessary wiring or valve parts. <\/li>\n<li>When the ECU\u2019s driver circuit is damaged, replacement and VIN\u2011matched programming are the most reliable solution; Flagship One provides certified modules and programming services. <\/li>\n<\/ul>\n<\/div>\n<h3>Introduction <\/h3>\n<p>Drivers who encounter a P0039 code will first notice that the engine no longer builds the expected boost. Acceleration feels sluggish, the boost gauge may wander or drop, and the vehicle can slip into a protective limp\u2011mode that limits power to protect the turbocharger. The check\u2011engine light flashes or stays on, prompting a scan. Because the fault is tied to the bypass valve\u2019s control circuit, the issue is not a simple sensor glitch; it reflects a voltage or communication problem that prevents the ECU from regulating boost pressure correctly. Early identification prevents prolonged stress on the turbocharger and avoids possible downstream damage.<\/p>\n<h3>Symptoms <\/h3>\n<ul>\n<li><strong>Reduced power on acceleration<\/strong> \u2013 the engine feels flat, especially above 2,000 rpm. <\/li>\n<li><strong>Boost pressure fluctuation<\/strong> \u2013 boost gauge shows erratic readings or fails to reach the target pressure. <\/li>\n<li><strong>Limp\u2011mode or \u201cpower\u2011reduction\u201d mode<\/strong> \u2013 the ECU limits boost to protect the turbo, often accompanied by a noticeable loss of torque. <\/li>\n<li><strong>Illuminated \u201ccheck engine\u201d light<\/strong> \u2013 stored P0039 and possibly related codes (e.g., P0038, P0092). <\/li>\n<li><strong>Unusual exhaust note<\/strong> \u2013 a whining or whistling sound may be heard when the bypass valve sticks open or closed. <\/li>\n<\/ul>\n<p>While a clogged air filter or a weak fuel pump could also limit power, the specific combination of boost instability and the P0039 code points to a control\u2011circuit issue rather than a simple mechanical restriction.<\/p>\n<h3>Why Turbocharger Bypass Valve A Problems Occur <\/h3>\n<h4>Electrical Signal Out of Specified Range <\/h4>\n<p>The ECU expects a precise voltage (typically 0.5 V \u2013 4.5 V) from the valve\u2019s position sensor. A deviation indicates a short, open circuit, or a degraded sensor element, causing the ECU to set P0039.<\/p>\n<h4>Faulty Bypass Valve Actuator <\/h4>\n<p>The valve itself contains a stepper motor or solenoid that modulates boost bypass. Mechanical wear, carbon buildup, or internal coil failure can prevent the actuator from reaching the commanded position, resulting in abnormal voltage feedback.<\/p>\n<h4>Wiring Harness Damage or Corrosion <\/h4>\n<p>High\u2011temperature engine bays subject wiring to heat, oil, and moisture. Cracked insulation, corroded connectors, or loose pins introduce resistance that skews voltage readings and triggers the range\/performance fault.<\/p>\n<h4>ECU Control\u2011Module Anomalies <\/h4>\n<p>The ECU\u2019s driver circuit that generates the PWM signal for the valve may develop internal board damage or suffer from corrupted calibration data after a software glitch. In such cases, the module sends incorrect commands despite a healthy valve and wiring.<\/p>\n<h4>Contamination or Mechanical Binding <\/h4>\n<p>Turbocharger oil leaks can coat the bypass valve\u2019s moving parts, creating friction that stalls the actuator. The ECU detects the stalled position as a voltage out\u2011of\u2011range condition.<\/p>\n<h3>Diagnostic and Repair Procedures <\/h3>\n<ol>\n<li><strong>Read and Clear Codes<\/strong> \u2013 Use a professional scan tool to retrieve P0039 and any accompanying codes. Clear them and perform a short\u2011run test to see if the code reappears.\n<\/li>\n<li><strong>Live Data Review<\/strong> \u2013 Observe the bypass valve\u2019s command voltage and feedback voltage while the engine revs from idle to 4,000 rpm. Values outside the 0.5\u20114.5 V window confirm the fault.\n<\/li>\n<li><strong>Visual Wiring Inspection<\/strong> \u2013 Check the harness for cracked insulation, burnt pins, or moisture. Clean and reseat connectors; replace any damaged sections.\n<\/li>\n<li><strong>Actuator Bench Test<\/strong> \u2013 Disconnect the valve and apply a 12 V reference to the actuator coil. The valve should open fully; resistance should read within manufacturer specifications (usually 4\u20116 \u03a9).\n<\/li>\n<li><strong>Voltage Drop Test<\/strong> \u2013 Measure voltage at the ECU connector and at the valve connector under load. A significant drop (&gt;0.5 V) points to wiring resistance.\n<\/li>\n<li><strong>ECU Re\u2011flash \/ Calibration<\/strong> \u2013 If voltage and wiring are sound, reprogram the ECU with the latest software to restore proper calibration tables. Labor is typically $200\u2011$300.\n<\/li>\n<li><strong>Component Replacement<\/strong> \u2013 Replace a defective valve actuator ($150\u2011$300) or a damaged wiring harness segment. Verify operation with a second live\u2011data scan.\n<\/li>\n<li><strong>Final Verification<\/strong> \u2013 Clear all codes, road\u2011test the vehicle for at least 15 minutes, and confirm that the check\u2011engine light remains off and boost stabilizes.\n<\/li>\n<\/ol>\n<p>Typical labor costs range from $150 to $350, while parts (valve actuator or wiring) add $120\u2011$300. If the ECU\u2019s driver circuit is identified as the source, module replacement (including VIN\u2011matched programming) averages $600\u2011$900 for the unit plus $200\u2011$300 labor.<\/p>\n<h3>When Replacement Makes Sense <\/h3>\n<p>Repair attempts are worthwhile when the fault originates from a single, replaceable component such as a cracked wire or a stuck valve. However, when voltage anomalies persist after wiring and actuator replacement, the ECU\u2019s internal driver circuit is likely compromised. Repeated repairs on a failing module seldom restore long\u2011term reliability; the risk of recurring P0039 or additional control\u2011circuit codes rises sharply.<\/p>\n<p>Modern control modules are complex and integrated with security and immobilizer systems. That&#8217;s why choosing a replacement isn&#8217;t only about the hardware\u2014it&#8217;s about correct programming and compatibility. <strong>Flagship One<\/strong> specializes in VIN\u2011matched control modules, providing a plug\u2011and\u2011drive solution backed by warranty. Their modules are pre\u2011programmed to the vehicle\u2019s exact specifications, eliminating dealer\u2011only re\u2011coding steps and ensuring seamless integration with the engine\u2019s boost\u2011control strategy.<\/p>\n<h3>Preventive Maintenance <\/h3>\n<ul>\n<li><strong>Maintain Engine\u2011Bay Cleanliness<\/strong> \u2013 Regularly clean the turbocharger and surrounding area to prevent oil and carbon buildup on the bypass valve. <\/li>\n<li><strong>Inspect Wiring at Service Intervals<\/strong> \u2013 Include a visual check of the bypass\u2011valve harness during oil changes; look for heat\u2011shield wear and connector corrosion. <\/li>\n<li><strong>Use Manufacturer\u2011Recommended Oil<\/strong> \u2013 Proper viscosity reduces oil leakage that can foul the valve mechanism. <\/li>\n<li><strong>Update ECU Software<\/strong> \u2013 Periodic re\u2011flashing with the latest calibration data can correct latent range\u2011performance issues. <\/li>\n<li><strong>Monitor Boost Levels<\/strong> \u2013 A handheld boost gauge can alert you to early fluctuations before the check\u2011engine light activates. <\/li>\n<\/ul>\n<p>Adhering to these practices helps the valve actuator and its control circuit stay within design tolerances, reducing the likelihood of a P0039 fault.<\/p>\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>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Turbocharger\/Supercharger Bypass Valve A control circuit range\/performance error in your vehicle cuts boost\u2014run a diagnostic now and schedule a repair.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-517187","post","type-post","status-publish","format-standard","hentry","category-auto-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>P0039 Code Symptoms, Causes, Diagnosis, Cost &amp; Repair Overview - Flagship One Blog<\/title>\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-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0039 Code Symptoms, Causes, Diagnosis, Cost &amp; Repair Overview - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Turbocharger\/Supercharger Bypass Valve A control circuit range\/performance error in your vehicle cuts boost\u2014run a diagnostic now and schedule a repair.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/\" \/>\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=\"2025-12-10T05:02:34+00:00\" \/>\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=\"6 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-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"P0039 Code Symptoms, Causes, Diagnosis, Cost &#038; Repair Overview\",\"datePublished\":\"2025-12-10T05:02:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/\"},\"wordCount\":1112,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"articleSection\":[\"Auto News\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/\",\"name\":\"P0039 Code Symptoms, Causes, Diagnosis, Cost & Repair Overview - Flagship One Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\"},\"datePublished\":\"2025-12-10T05:02:34+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0039 Code Symptoms, Causes, Diagnosis, Cost &#038; Repair Overview\"}]},{\"@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":"P0039 Code Symptoms, Causes, Diagnosis, Cost & Repair Overview - Flagship One Blog","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-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/","og_locale":"en_US","og_type":"article","og_title":"P0039 Code Symptoms, Causes, Diagnosis, Cost & Repair Overview - Flagship One Blog","og_description":"Turbocharger\/Supercharger Bypass Valve A control circuit range\/performance error in your vehicle cuts boost\u2014run a diagnostic now and schedule a repair.","og_url":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/","og_site_name":"Flagship One Blog","article_publisher":"https:\/\/www.facebook.com\/flagshipone","article_author":"https:\/\/www.facebook.com\/flagshipone\/","article_published_time":"2025-12-10T05:02:34+00:00","author":"FlagshipOne","twitter_card":"summary_large_image","twitter_creator":"@theflagshipone","twitter_site":"@theflagshipone","twitter_misc":{"Written by":"FlagshipOne","Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/#article","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/"},"author":{"name":"FlagshipOne","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700"},"headline":"P0039 Code Symptoms, Causes, Diagnosis, Cost &#038; Repair Overview","datePublished":"2025-12-10T05:02:34+00:00","mainEntityOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/"},"wordCount":1112,"commentCount":0,"publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"articleSection":["Auto News"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/","url":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/","name":"P0039 Code Symptoms, Causes, Diagnosis, Cost & Repair Overview - Flagship One Blog","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/#website"},"datePublished":"2025-12-10T05:02:34+00:00","breadcrumb":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0039-turbochargersupercharger-bypass-valve-control-circuit-rangeperformance\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.fs1inc.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P0039 Code Symptoms, Causes, Diagnosis, Cost &#038; Repair Overview"}]},{"@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\/517187","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=517187"}],"version-history":[{"count":0,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/517187\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/media?parent=517187"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/categories?post=517187"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/tags?post=517187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}