{"id":519139,"date":"2025-12-11T06:41:39","date_gmt":"2025-12-11T11:41:39","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/dtc-u0157-lost-communication-information-center-b\/"},"modified":"2025-12-11T06:41:39","modified_gmt":"2025-12-11T11:41:39","slug":"dtc-u0157-lost-communication-information-center-b","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/dtc-u0157-lost-communication-information-center-b\/","title":{"rendered":"U0157 Code Symptoms, Causes, Diagnosis &#038; Complete Repair Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">U0157<\/div>\n<h1>U0157 Code Symptoms, Causes, Diagnosis &amp; Complete Repair Guide<\/h1>\n<p class=\"hero-subtitle\">\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>U0157 means \u201cLost Communication With Information Center B.\u201d <\/li>\n<li>Typical signs: interior lights dim or stay off, power\u2011window\/lock commands fail, and the information\u2011center warning lamp flashes or stays on. <\/li>\n<li>Causes are usually network faults, wiring\/connectors, power\u2011supply issues, or a corrupted\/failed Information Center B module. <\/li>\n<li>Diagnosis starts with a CAN\u2011bus scan, then wiring continuity checks and module\u2011communication tests. <\/li>\n<li>Replacement with a VIN\u2011matched, pre\u2011programmed module eliminates recurring communication loss and restores all body\u2011control functions. <\/li>\n<\/ul>\n<\/div>\n<p>When the vehicle\u2019s information\u2011center warning lamp flashes or remains illuminated, you may notice interior illumination flickering, courtesy lights that never turn on, and power\u2011window or door\u2011lock buttons that feel unresponsive. These symptoms appear suddenly and can worsen as the vehicle ages, because the body\u2011control network relies on continuous data exchange with Information Center B. Early identification prevents loss of convenience functions and avoids cascading faults in other body\u2011control modules. <\/p>\n<h2>Symptoms <\/h2>\n<ul>\n<li><strong>Intermittent or dead interior lighting<\/strong> \u2013 dome light, map lights, and footwell LEDs fail to activate. <\/li>\n<li><strong>Non\u2011responsive power\u2011window or power\u2011door\u2011lock switches<\/strong> \u2013 pressing the button produces no movement or click. <\/li>\n<li><strong>Flashing or steady information\u2011center warning lamp<\/strong> on the instrument cluster. <\/li>\n<li><strong>Loss of courtesy\u2011light activation<\/strong> when doors are opened, often accompanied by a \u201cno\u2011light\u201d message on the dash. <\/li>\n<\/ul>\n<p>These cues point directly to a breakdown in the communication path between the vehicle\u2019s CAN network and the Information Center B module. <\/p>\n<h2>Why Information Center B Problems Occur <\/h2>\n<h3>Communication Network Failure <\/h3>\n<p>The CAN (Controller Area Network) bus links all body\u2011control modules. A disruption\u2014such as a corrupted bus frame or a timing\u2011error caused by a malfunctioning gateway\u2014prevents the Engine Control Module, Body Control Module, and Information Center B from exchanging data. When the network drops packets, the Information Center B cannot confirm status updates, triggering U0157. <\/p>\n<h3>Faulty Information Center B Module <\/h3>\n<p>Internal circuit\u2011board damage, moisture intrusion, or component fatigue can render the module unable to transmit or receive messages. Even if the wiring is intact, a defective microcontroller inside the module will cause a persistent loss of communication. <\/p>\n<h3>Wiring or Connector Issues <\/h3>\n<p>Corroded pins, broken harness wires, or loose connector clips break the physical link to the module. A single high\u2011resistance joint can corrupt CAN\u2011high\/low voltage levels, causing the control unit to time out and set U0157. <\/p>\n<h3>Power\u2011Supply Problems <\/h3>\n<p>Information Center B draws power from the vehicle\u2019s 12 V system through a fused supply. A marginal fuse, deteriorated power relay, or voltage drop below 9 V under load can starve the module, leading to intermittent shutdowns and communication loss. <\/p>\n<h3>Software Corruption <\/h3>\n<p>Factory\u2011installed firmware may become corrupted after an incomplete flash, a battery disconnect, or a failed reprogramming attempt. Errant code can disable the module\u2019s CAN interface, prompting the diagnostic trouble code. <\/p>\n<h2>Diagnostic and Repair Procedures <\/h2>\n<ol>\n<li><strong>Scan the CAN bus<\/strong> \u2013 Use a professional OBD\u2011II scanner capable of reading body\u2011control codes. Confirm U0157 and note any additional network\u2011related codes (e.g., U0100, U0140).\n<\/li>\n<li><strong>Verify power supply<\/strong> \u2013 Measure voltage at the Information Center B fuse location with the ignition on. Voltage should be 12.4\u201112.8 V. Replace a blown or weak fuse (typically 5 A\u201310 A).\n<\/li>\n<li><strong>Inspect wiring harness<\/strong> \u2013 Follow the harness from the main body\u2011control junction to the Information Center B. Look for cracked insulation, chafed wires, and corrosion. Perform a continuity test on each pin; resistance above 0.5 \u03a9 indicates a problem.\n<\/li>\n<li><strong>Check connectors<\/strong> \u2013 Disconnect and reconnect the module\u2019s plug. Clean pins with electrical contact cleaner and ensure a firm latch.\n<\/li>\n<li><strong>Perform a module\u2011communication test<\/strong> \u2013 Many scan tools can request a \u201cread data by identifier\u201d from Information Center B. A successful response confirms functional communication. Failure after wiring verification points to a defective module.\n<\/li>\n<li><strong>Reprogram the module<\/strong> \u2013 If the software version is outdated or corrupted, download the latest factory firmware and flash the module using the manufacturer\u2019s programming tool. Verify successful flash by re\u2011scanning for codes.\n<\/li>\n<li><strong>Replace the module<\/strong> \u2013 When communication tests repeatedly fail despite clean wiring and proper power, install a replacement Information Center B. Ensure the new unit is VIN\u2011matched and pre\u2011programmed to the vehicle\u2019s configuration.\n<\/li>\n<\/ol>\n<p>Typical labor for a full diagnosis and reprogramming ranges from $150\u2011$250. Module replacement, including programming, averages $600\u2011$900 for the part plus $200\u2011$300 labor. <\/p>\n<h2>When Information Center B 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>If the module fails the communication test after exhaustive wiring and power\u2011supply checks, internal damage is the most likely cause. While board\u2011level repairs can temporarily restore operation, moisture\u2011induced corrosion or cracked traces often recur, leading to repeated failures. A fresh, factory\u2011specification unit eliminates the risk of hidden defects and restores full body\u2011control functionality. <\/p>\n<p>Modern control modules are complex and integrated with security and immobilizer systems. That\u2019s why choosing a replacement isn\u2019t only about the hardware\u2014it&#8217;s about correct programming and compatibility. <strong>Flagship One specializes in VIN\u2011matched control modules, providing a plug\u2011and\u2011drive solution backed by warranty.<\/strong> Their modules arrive pre\u2011programmed to the exact software version required for your vehicle, ensuring seamless integration with the CAN network and eliminating dealer\u2011programming delays. <\/p>\n<h2>Preventive Maintenance <\/h2>\n<ul>\n<li><strong>Regularly inspect wiring harnesses<\/strong> for signs of wear, especially in areas subject to movement (door jambs, seat rails). <\/li>\n<li><strong>Keep connectors clean and dry<\/strong>; apply dielectric grease to prevent corrosion. <\/li>\n<li><strong>Maintain battery health<\/strong>; a weak battery can cause voltage drops that stress body\u2011control modules. <\/li>\n<li><strong>Schedule periodic CAN\u2011bus scans<\/strong> during routine service visits to catch emerging communication errors before they trigger a fault. <\/li>\n<li><strong>Avoid aftermarket modifications<\/strong> to interior lighting or accessory circuits that bypass the Information Center B, as they can introduce voltage spikes or ground loops.<\/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>Info Center B lost communication in your vehicle? Lights, locks, and safety alerts may fail\u2014scan network, check wiring, then reprogram or replace 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-519139","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>U0157 Code Symptoms, Causes, Diagnosis &amp; Complete Repair Guide - 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-u0157-lost-communication-information-center-b\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"U0157 Code Symptoms, Causes, Diagnosis &amp; Complete Repair Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Info Center B lost communication in your vehicle? 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