{"id":532671,"date":"2026-07-18T16:40:04","date_gmt":"2026-07-18T20:40:04","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=532671"},"modified":"2026-07-18T16:40:04","modified_gmt":"2026-07-18T20:40:04","slug":"1996-chrysler-lhs-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/1996-chrysler-lhs-pcm-replacement-guide\/","title":{"rendered":"1996 Chrysler LHS Powertrain and Engine Control Module Relearn and Replacement Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>1996 Chrysler LHS Powertrain and Engine Control Module Relearn and Replacement Guide<\/h1>\n<p class=\"hero-subtitle\">In the 1996 Chrysler LHS, the Powertrain Control Module (PCM) and Engine Control Module (ECM) act as the vehicle&#8217;s electronic brains, managing fuel delivery, ignition timing, and transmission shifting. A failure in either unit can cause loss of power, stalling, or illumination of the check\u2011engine light, because the engine can no longer receive calibrated commands from the computer.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>Relearn procedures for PCM and ECM each require roughly half an hour of labor.<\/li>\n<li>Factory removal reaches the module beside the air cleaner, simplifying access.<\/li>\n<li>Flagship One provides VIN\u2011programmed units, eliminating post\u2011install programming steps.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>When a 1996 Chrysler LHS experiences persistent check\u2011engine illumination or erratic performance, the root cause often lies in the powertrain or engine control modules. Understanding how these computers function, where they sit, and what steps are required after removal can save you time and money. This guide walks you through the location of the PCM and ECM, the labor involved in swapping them, the factory\u2011required relearn processes, and how a Flagship One replacement can streamline the job. By the end, you\u2019ll know what to expect during service and how to keep the new module operating reliably.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 1996 Chrysler LHS<\/h2>\n<p>The Powertrain Control Module in a 1996 Chrysler LHS oversees fuel injection, ignition timing, and transmission shift strategy, while the Engine Control Module focuses on engine\u2011specific parameters such as idle control and emissions monitoring. Both computers exchange data with sensors and actuators to keep the powertrain running smoothly; any disruption can trigger drivability problems or emission\u2011related failures. Because the vehicle relies on precise timing and calibrated maps, maintaining accurate module programming is essential for performance and compliance. The <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/chrysler-pcm-ecm-ecu-engine-computer\/lhs-engine-computers.html\">1996 Chrysler LHS replacement PCM<\/a> and ECM are interchangeable only when they match the factory specifications and are properly calibrated, ensuring the vehicle\u2019s control strategy remains intact.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The factory removal procedure indicates that the control module sits adjacent to the air cleaner assembly, making it reachable without extensive disassembly. To replace the unit, a technician typically spends about 0.5 hours on the PCM and the same on the ECM, according to the labor guide. The process involves disconnecting the electrical connectors, removing mounting bolts, and sliding the module out of its bracket. Installation reverses these steps, with careful attention to connector alignment and bolt torque if specified by the manufacturer. Because the module is positioned near the intake, keeping the area clean helps prevent debris from entering the new unit during installation.<\/p>\n<figure style=\"margin:22px auto;text-align:center;max-width:720px\"><img decoding=\"async\" style=\"max-width:100%;height:auto;border:1px solid #e2e6ec;border-radius:8px\" src=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/07\/1996-chrysler-lhs-ecm-location-card-1.webp\" alt=\"1996 Chrysler LHS PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">Typical PCM mounting area on the 1996 Chrysler LHS (reference).<\/figcaption><\/figure>\n<div style=\"background:#f7f9fc;border:1px solid #e2e8f2;border-radius:10px;padding:18px 24px;margin:18px 0\">\n<h3 style='margin-top:0'>How to Reach the PCM on the 1996 Chrysler LHS<\/h3>\n<ol style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> air cleaner.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> PCM 2 40-way connector ivattachingbolts.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> 2 bolts from PCM bracket.<\/li>\n<\/ol>\n<p style='margin:10px 0 0 0'><em>Work with the ignition off, and treat the module as static-sensitive: avoid touching the connector pins at any point.<\/em><\/p>\n<\/div>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Operation<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Configuration<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Book Time<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Reset<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.3 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>After installing a new PCM or ECM in a 1996 Chrysler LHS, the factory procedure calls for a relearn of the powertrain control module and a separate relearn of the engine control module, each taking roughly half an hour of labor. Flagship One units arrive already VIN\u2011programmed, so the <a href=\"https:\/\/www.fs1inc.com\/1996-chrysler-lhs-3-5l-engine-computer-pcm-ecm-ecu-programmed-plug-play.html\">a VIN\u2011programmed replacement unit<\/a> eliminates the need for those post\u2011install relearn steps, allowing you to complete the job without additional programming time.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>Typical signs of a failing PCM or ECM in a 1996 Chrysler LHS include a persistent check\u2011engine light, engine hesitation, rough idle, or unexpected transmission shifts. You may also notice a loss of power during acceleration or the vehicle refusing to start. Diagnostic scans often reveal communication failures or specific fault codes such as timing error, indicating internal clock issues that prevent the module from synchronizing with the engine\u2019s control strategy. Addressing these symptoms promptly can avoid further damage to related sensors or the drivetrain.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Factory Service Bulletins Worth Knowing<\/h2>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Bulletin<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Subject<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">What It Addresses<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Rc-678-96 California Emissions Recall #678 &#8212; Reprogram Powertrain Control Module<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>18-35-96<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">18-35-96 Erroneous MIL Illumination With Hex Code $58, Elimination Of PCM Reset<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>18-037-05<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">18-037-05 Flash Programming Failure Recovery Using DRBIII\u00ae<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 1996 Chrysler LHS<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Maintain a healthy charging system to ensure stable voltage for the modules.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect and clean all ground connections and sensor plugs regularly.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump\u2011starting the vehicle, which can introduce voltage spikes.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Promptly diagnose and clear any stored fault codes.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep connector seals intact to prevent moisture intrusion.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Replace aging battery cables to reduce resistance.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>What labor time is required to replace the PCM in a 1996 Chrysler LHS?<\/h3>\n<p>The labor guide estimates about half an hour for the Powertrain Control Module replacement, covering removal, installation, and connector work.<\/p>\n<h3>Do I need special tools to reset the ECM on a 1996 Chrysler LHS?<\/h3>\n<p>Factory procedures call for a relearn sequence, but a Flagship One VIN\u2011programmed unit performs the reset automatically, eliminating the need for additional tools.<\/p>\n<h3>Can a faulty PCM cause transmission shifting problems in my 1996 Chrysler LHS?<\/h3>\n<p>Yes, because the PCM controls shift timing, a malfunction can result in harsh or delayed shifts, often accompanied by related diagnostic codes.<\/p>\n<h3>Is the air cleaner assembly related to PCM access on this vehicle?<\/h3>\n<p>The PCM is located next to the air cleaner, so removing or moving the assembly provides the clearance needed for module removal.<\/p>\n<h3>What does bulletin Rc-678-96 require for the 1996 Chrysler LHS?<\/h3>\n<p>It mandates a reprogramming of the Powertrain Control Module to address a California emissions recall.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When the PCM or ECM in your 1996 Chrysler LHS needs service, you can choose a repair that follows the factory relearn steps or opt for a Flagship One refurbished replacement that arrives VIN\u2011programmed. Both approaches restore proper engine management, but the pre\u2011programmed unit can reduce shop time and eliminate the need for post\u2011install calibration.<\/p>\n<figure style=\"margin:22px auto;text-align:center;max-width:720px\"><img decoding=\"async\" style=\"max-width:100%;height:auto;border:1px solid #e2e6ec;border-radius:8px\" src=\"https:\/\/www.fs1inc.com\/media\/wysiwyg\/googleshop\/chryslertcblack\/chryslertc-pcm-blackplug-1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 1996 Chrysler LHS\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 1996 Chrysler LHS from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/1996-chrysler-lhs-3-5l-engine-computer-pcm-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 1996 Chrysler LHS<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/chrysler-pcm-ecm-ecu-engine-computer\/lhs-engine-computers.html\">Chrysler LHS module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<p>Addressing PCM or ECM issues in your 1996 Chrysler LHS promptly helps maintain performance and emissions compliance. Consider a Flagship One VIN\u2011programmed replacement to simplify the process and get back on the road with confidence.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>If your 1996 Chrysler LHS shows PCM or ECM errors, you may need a relearn after service. Learn the cautions, required steps, and outcomes for a reliable fix.<\/p>\n","protected":false},"author":1,"featured_media":521793,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,263],"tags":[77,56,943],"class_list":["post-532671","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-chrysler","tag-77","tag-chrysler","tag-lhs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>1996 Chrysler LHS Powertrain and Engine Control Module Relearn and Replacement 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\/1996-chrysler-lhs-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1996 Chrysler LHS Powertrain and Engine Control Module Relearn and Replacement Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"If your 1996 Chrysler LHS shows PCM or ECM errors, you may need a relearn after service. 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