{"id":517322,"date":"2025-12-10T02:15:50","date_gmt":"2025-12-10T07:15:50","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/"},"modified":"2025-12-10T02:15:50","modified_gmt":"2025-12-10T07:15:50","slug":"dtc-p0171-system-too-lean-bank-1","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/","title":{"rendered":"P0171 Code Symptoms, Causes, Diagnosis, Repair &#038; Cost Overview"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">P0171<\/div>\n<h1>P0171 Code Symptoms, Causes, Diagnosis, Repair &amp; Cost Overview<\/h1>\n<p class=\"hero-subtitle\">\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>P0171 = \u201cSystem Too Lean Bank 1\u201d \u2013 the ECM detects excess air vs. fuel on the first cylinder bank. <\/li>\n<li>Typical driver\u2011noticed signs: rough idle, hesitation on acceleration, loss of power, and a steady check\u2011engine lamp. <\/li>\n<li>Most causes involve air\u2011intake leaks, a dirty MAF sensor, or fuel\u2011delivery irregularities, but the ECM\u2019s ability to read and process sensor data is the common denominator. <\/li>\n<li>Proper resolution starts with a full module scan, live\u2011data verification, and, if needed, ECM reprogramming or replacement. <\/li>\n<li>Flagship One provides VIN\u2011matched, pre\u2011programmed control modules with a warranty for hassle\u2011free installation.<\/li>\n<\/ul>\n<\/div>\n<h3>Introduction <\/h3>\n<p>Drivers who see a check\u2011engine light accompanied by a rough\u2011idle or a momentary hesitation when pressing the accelerator are often looking at a P0171 diagnostic trouble code. The code tells you the engine control module (ECM) has measured a lean condition on Bank 1 \u2013 meaning more air than fuel is reaching the combustion chambers on that side of the engine. Because the ECM controls fuel\u2011injection timing, ignition timing, and sensor interpretation, any mis\u2011reading can translate directly into the symptoms you feel behind the wheel. Early identification prevents fuel\u2011economy loss, possible stalling, and long\u2011term wear on the powertrain.<\/p>\n<h2>Symptoms <\/h2>\n<ul>\n<li><strong>Check\u2011engine light illuminated<\/strong> \u2013 the ECM stores P0171 and triggers the MIL. <\/li>\n<li><strong>Rough or uneven idle<\/strong> \u2013 the engine may shake or stall at stoplights. <\/li>\n<li><strong>Hesitation or \u201clugging\u201d during light acceleration<\/strong> \u2013 power drops until the throttle is opened wider. <\/li>\n<li><strong>Noticeable loss of power under load<\/strong> \u2013 climbing hills or overtaking feels sluggish. <\/li>\n<li><strong>Slight increase in fuel consumption<\/strong> \u2013 the engine compensates for the lean mixture.<\/li>\n<\/ul>\n<p>These signs appear together or individually, but the common thread is the ECM\u2019s perception of an air\u2011to\u2011fuel imbalance on Bank 1.<\/p>\n<h2>Why This Happens <\/h2>\n<h3>Vacuum Leak in the Intake Tract <\/h3>\n<p>A cracked hose, loose intake manifold gasket, or a leaking brake\u2011vacuum booster can admit extra air before the mass\u2011air\u2011flow (MAF) sensor. The ECM then calculates a lean mixture because the actual airflow exceeds the sensor\u2019s reference.<\/p>\n<h3>Contaminated or Faulty MAF Sensor <\/h3>\n<p>The MAF sensor measures the amount of air entering the engine. Dirt, oil residue, or sensor element failure reduces its output voltage, leading the ECM to think less air is present while the real airflow is higher, producing a lean reading.<\/p>\n<h3>Inadequate Fuel Delivery <\/h3>\n<p>While the fuel pump and injectors are not primary repair items in this article, a weak pump or clogged fuel filter can limit fuel flow. The ECM receives normal airflow data but insufficient fuel, resulting in a lean condition. Because the ECM is the decision\u2011making hub, its calibration may need verification.<\/p>\n<h3>Oxygen Sensor Drift or Failure <\/h3>\n<p>The downstream O\u2082 sensor provides feedback that the ECM uses to fine\u2011tune the fuel mixture. A sensor that reads falsely rich will cause the ECM to lean out the mixture on Bank 1.<\/p>\n<h3>ECM Communication or Calibration Issue <\/h3>\n<p>Corrupted flash memory, failed internal circuitry, or outdated software can cause the ECM to misinterpret sensor signals. Even with perfectly functioning hardware, a module that cannot communicate correctly with the vehicle\u2019s network will log P0171.<\/p>\n<h2>Diagnostic and Repair Procedures <\/h2>\n<ol>\n<li><strong>Connect a professional scan tool<\/strong> \u2013 retrieve P0171 and any related codes. Verify that the code is active and not a pending flag.\n<\/li>\n<li><strong>View live sensor data<\/strong> \u2013 compare MAF voltage (typically 0.5\u20134.5 V) and short\u2011term fuel trim (STFT) for Bank 1. An STFT beyond \u00b110 % indicates a lean condition.\n<\/li>\n<li><strong>Perform an intake\u2011leak test<\/strong> \u2013 use a smoke machine or a handheld vacuum gauge to locate any unmetered air entry. Repair hoses or gaskets before proceeding.\n<\/li>\n<li><strong>Inspect and clean the MAF sensor<\/strong> \u2013 use a MAF\u2011specific cleaner; avoid touching the sensor wires. Re\u2011measure voltage; a change of &gt;0.2 V after cleaning confirms the sensor was the cause.\n<\/li>\n<li><strong>Check O\u2082 sensor operation<\/strong> \u2013 monitor downstream O\u2082 voltage; a steady 0.45 V suggests a stuck\u2011rich reading that can drive a lean condition.\n<\/li>\n<li><strong>Run an ECM communication test<\/strong> \u2013 verify that the module can exchange data on the CAN bus without errors. Look for \u201cECU not responding\u201d messages.\n<\/li>\n<li><strong>Reprogram or update ECM software<\/strong> \u2013 if the module\u2019s calibration is outdated, apply the latest OEM flash file. Labor for reprogramming typically runs $150\u2011$300.\n<\/li>\n<li><strong>Replace the ECM only if diagnostics confirm internal failure<\/strong> \u2013 replacement units vary $600\u2011$900 plus $200\u2011$300 labor. Ensure the new unit is VIN\u2011matched and pre\u2011programmed for your vehicle.\n<\/li>\n<\/ol>\n<p>While a faulty fuel pump or injector could also cause a lean condition, the issue may stem from the ECM not communicating correctly with the system. A diagnostic scan and module communication test will determine if module replacement or reprogramming is needed.<\/p>\n<h2>When Replacement Makes More Sense Than Repair <\/h2>\n<div class=\"flagship-logo-section\">\n<a href=\"https:\/\/www.fs1inc.com\/\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<img decoding=\"async\" alt=\"Flagship One\" class=\"flagship-logo\" src=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg\"\/><br \/>\n<\/a>\n<\/div>\n<p>Modern control modules integrate engine management, emissions control, and vehicle\u2011security functions. When internal circuitry shows signs of corrosion, memory cell degradation, or repeated communication faults, repair attempts often provide only a temporary fix. A compromised ECM can re\u2011trigger lean codes even after sensor cleaning, leading to recurring drivability problems and costly warranty work.<\/p>\n<p><strong>Flagship One specializes in VIN\u2011matched control modules, providing a plug\u2011and\u2011drive solution backed by a comprehensive warranty.<\/strong> Because each module is programmed to the exact software version and security keys of your vehicle, installation eliminates the need for dealer\u2011only re\u2011coding. The combination of factory\u2011level programming and rigorous testing ensures reliable performance and long\u2011term durability.<\/p>\n<h2>Preventive Maintenance <\/h2>\n<ul>\n<li><strong>Replace the air\u2011filter regularly<\/strong> \u2013 a clean filter reduces the chance of debris reaching the MAF sensor. <\/li>\n<li><strong>Inspect vacuum lines during routine service<\/strong> \u2013 look for cracks, splits, or loose connections every 12 months or 12,000 mi. <\/li>\n<li><strong>Keep the MAF sensor clean<\/strong> \u2013 schedule a cleaning when the air\u2011filter is changed, especially in dusty environments. <\/li>\n<li><strong>Use OEM\u2011specified fuel<\/strong> \u2013 proper octane and additive levels help maintain injector and pump health, reducing fuel\u2011delivery stress on the ECM. <\/li>\n<li><strong>Update ECM software at manufacturer\u2011recommended intervals<\/strong> \u2013 many dealers release calibration tweaks that improve lean\u2011condition detection and correction. <\/li>\n<li><strong>Run a full diagnostic scan at major service intervals<\/strong> \u2013 early detection of sensor drift or communication glitches prevents the code from becoming active.<\/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>\n","protected":false},"excerpt":{"rendered":"<p>Bank 1 too lean hurts fuel economy and can stall your vehicle \u2013 read P0171, test air intake and sensors, then repair or reprogram the control module.<\/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-517322","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>P0171 Code Symptoms, Causes, Diagnosis, Repair &amp; Cost 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-p0171-system-too-lean-bank-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0171 Code Symptoms, Causes, Diagnosis, Repair &amp; Cost Overview - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Bank 1 too lean hurts fuel economy and can stall your vehicle \u2013 read P0171, test air intake and sensors, then repair or reprogram the control module.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/\" \/>\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=\"2025-12-10T07:15:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg\" \/>\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=\"5 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-p0171-system-too-lean-bank-1\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"P0171 Code Symptoms, Causes, Diagnosis, Repair &#038; Cost Overview\",\"datePublished\":\"2025-12-10T07:15:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/\"},\"wordCount\":1071,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"articleSection\":[\"Auto News\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/\",\"name\":\"P0171 Code Symptoms, Causes, Diagnosis, Repair & Cost Overview - Flagship One Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"datePublished\":\"2025-12-10T07:15:50+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"contentUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/fs1inc_logo2-scaled.jpg\",\"width\":2560,\"height\":617},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/dtc-p0171-system-too-lean-bank-1\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P0171 Code Symptoms, Causes, Diagnosis, Repair &#038; Cost 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":"P0171 Code Symptoms, Causes, Diagnosis, Repair & Cost 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-p0171-system-too-lean-bank-1\/","og_locale":"en_US","og_type":"article","og_title":"P0171 Code Symptoms, Causes, Diagnosis, Repair & Cost Overview - Flagship One Blog","og_description":"Bank 1 too lean hurts fuel economy and can stall your vehicle \u2013 read P0171, test air intake and sensors, then repair or reprogram the control module.","og_url":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/","og_site_name":"Flagship One Blog","article_publisher":"https:\/\/www.facebook.com\/flagshipone","article_author":"https:\/\/www.facebook.com\/flagshipone\/","article_published_time":"2025-12-10T07:15:50+00:00","og_image":[{"url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","type":"","width":"","height":""}],"author":"FlagshipOne","twitter_card":"summary_large_image","twitter_creator":"@theflagshipone","twitter_site":"@theflagshipone","twitter_misc":{"Written by":"FlagshipOne","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#article","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/"},"author":{"name":"FlagshipOne","@id":"https:\/\/www.fs1inc.com\/blog\/#\/schema\/person\/a3cf463514bd03eb7656953ef8f75700"},"headline":"P0171 Code Symptoms, Causes, Diagnosis, Repair &#038; Cost Overview","datePublished":"2025-12-10T07:15:50+00:00","mainEntityOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/"},"wordCount":1071,"commentCount":0,"publisher":{"@id":"https:\/\/www.fs1inc.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","articleSection":["Auto News"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/","url":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/","name":"P0171 Code Symptoms, Causes, Diagnosis, Repair & Cost Overview - Flagship One Blog","isPartOf":{"@id":"https:\/\/www.fs1inc.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#primaryimage"},"image":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#primaryimage"},"thumbnailUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","datePublished":"2025-12-10T07:15:50+00:00","breadcrumb":{"@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#primaryimage","url":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","contentUrl":"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2025\/12\/fs1inc_logo2-scaled.jpg","width":2560,"height":617},{"@type":"BreadcrumbList","@id":"https:\/\/www.fs1inc.com\/blog\/dtc-p0171-system-too-lean-bank-1\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.fs1inc.com\/blog\/"},{"@type":"ListItem","position":2,"name":"P0171 Code Symptoms, Causes, Diagnosis, Repair &#038; Cost 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\/517322","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=517322"}],"version-history":[{"count":0,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/posts\/517322\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/media?parent=517322"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/categories?post=517322"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fs1inc.com\/blog\/wp-json\/wp\/v2\/tags?post=517322"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}