{"id":532735,"date":"2026-07-17T16:20:07","date_gmt":"2026-07-17T20:20:07","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=532735"},"modified":"2026-07-17T16:20:07","modified_gmt":"2026-07-17T20:20:07","slug":"2003-chrysler-concorde-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2003-chrysler-concorde-pcm-replacement-guide\/","title":{"rendered":"2003 Chrysler Concorde PCM and ECM Replacement Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2003 Chrysler Concorde PCM and ECM Replacement Guide<\/h1>\n<p class=\"hero-subtitle\">In the 2003 Chrysler Concorde, the Powertrain Control Module (PCM) and Engine Control Module (ECM) act as the vehicle&#8217;s central computers, interpreting sensor data to regulate fuel, spark, and transmission. A malfunction typically stems from internal circuitry degradation, corrupted software, or loss of communication with diagnostic tools, leading to loss of driveability and stored trouble codes.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>PCM and ECM removal each require about 0.4\u202fhours of labor per the factory book.<\/li>\n<li>Relearn procedures for the engine control module add roughly 0.5\u202fhours after installation.<\/li>\n<li>Factory programming uses the DRBIII\u00ae scan tool to load the original VIN and mileage.<\/li>\n<li>Flagship One units arrive pre\u2011programmed, eliminating the need for on\u2011site VIN entry.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>When a 2003 Chrysler Concorde begins to exhibit irregular idle, stalling, or a complete lack of power, the underlying issue often traces back to its electronic control modules. These computers coordinate everything from fuel injection timing to transmission shift points, so any loss of function can quickly render the vehicle undrivable. This guide walks you through what the PCM and ECM do in this particular model, how they are accessed, the steps required to reinstall a replacement, and what to expect after the job is done. By the end, you will understand the repair workflow, the importance of proper programming, 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 2003 Chrysler Concorde<\/h2>\n<p>The Powertrain Control Module in the 2003 Chrysler Concorde serves as the brain that merges data from the engine, transmission, and emission sensors to command fuel delivery, ignition timing, and gear shifts. It also monitors system health and stores diagnostic trouble codes when parameters fall outside normal ranges. The Engine Control Module works in tandem, focusing on engine\u2011specific functions such as throttle position, coolant temperature, and knock detection. Together, they ensure smooth acceleration, optimal fuel economy, and compliance with emissions standards. A failure in either unit can disrupt communication with the vehicle\u2019s diagnostics, trigger fault codes, and cause drivability problems. Because the PCM and ECM share many internal components, a single hardware defect may affect both, making replacement a common solution. The module replacement process for the Concorde often involves removing the unit from its mounting bracket, disconnecting the electrical harness, and reinstalling a new or remanufactured part. <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/chrysler-pcm-ecm-ecu-engine-computer\/concorde-engine-computers.html\">replacement PCM for the Concorde<\/a> ensures that the vehicle\u2019s control strategy is restored to factory specifications.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What Replacing the PCM Involves<\/h2>\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\/2003-chrysler-concorde-pcm-service-figure.webp\" alt=\"2003 Chrysler Concorde PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">From the factory PCM removal procedure for the 2003 Chrysler Concorde.<\/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 2003 Chrysler Concorde<\/h3>\n<ol style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\"><b>Unbolt<\/b> the washer bottle filler neck and reposition.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> the 4 PCM electrical connector.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the 3 fasteners from PCM mounting ().<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> PCM ().<\/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 R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">300M<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.4 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\">Concorde<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.4 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\">300M<\/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\">Concorde<\/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 R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">300M<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.4 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\">Concorde<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.4 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>Factory re\u2011programming of the PCM after replacement calls for the DRBIII\u00ae scan tool to write the original VIN and mileage back into the unit, followed by a series of calibration cycles. The service information notes that the negative battery cable must be reconnected before re\u2011programming the radio and clock, which is part of the overall vehicle initialization. Flagship One provides units that arrive already loaded with the correct identification data, so the technician can skip the VIN entry step and proceed directly to the relearn routine. This reduces shop time and eliminates a common source of error. The replacement arrives as <a href=\"https:\/\/www.fs1inc.com\/2003-chrysler-concorde-2-7l-engine-computer-pcm-ecm-ecu-programmed.html\">a VIN-programmed replacement unit<\/a> ready for immediate installation.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM or ECM in the 2003 Chrysler Concorde often reveals itself through a combination of drivability and diagnostic issues. Common signs include a complete no\u2011start condition, intermittent stalling at idle, rough acceleration, or unexpected transmission shift delays. Drivers may also notice the check engine light flashing and the scan tool reporting communication loss with the control modules. In some cases, the vehicle may store a generic fault such as <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">communication fault<\/a>, indicating that the PCM is not responding to diagnostic requests. These symptoms typically arise when internal circuitry degrades, the software becomes corrupted, or the module\u2019s connector becomes dirty or loose. Early detection and prompt replacement help avoid prolonged loss of power and potential damage to related systems.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2003 Chrysler Concorde<\/h2>\n<p>The following internal trouble codes are documented for the 2003 Chrysler Concorde and may appear when the PCM or ECM is malfunctioning:<\/p>\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\">Code<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Meaning<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Full Guide<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0600-serial-communication-link\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0600<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0600-serial-communication-link\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Module-internal fault<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0600-serial-communication-link\/\" style=\"color:#0563C1\"><b><u>Full P0600 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0601<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal memory checksum error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#0563C1\"><b><u>Full P0601 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 2003 Chrysler Concorde<\/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 avoid voltage spikes that can damage electronic modules.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect and clean ground straps and connector pins regularly to ensure solid electrical contact.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid using jump\u2011starts or external power sources that exceed the vehicle\u2019s voltage specifications.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any stored diagnostic codes promptly to prevent prolonged stress on the control modules.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep connector seals intact and free of moisture to protect against corrosion.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use a quality battery maintainer if the vehicle is stored for extended periods.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>What are the labor times for replacing the PCM in a 2003 Chrysler Concorde?<\/h3>\n<p>The factory book lists 0.4\u202fhours for removal and reinstall of the Powertrain Control Module on this model.<\/p>\n<h3>Does the ECM require a relearn after replacement on a 2003 Chrysler Concorde?<\/h3>\n<p>Yes, the engine control module relearn procedure is estimated at 0.5\u202fhours according to the labor guide.<\/p>\n<h3>Can I use a generic scan tool to program the new PCM on a 2003 Chrysler Concorde?<\/h3>\n<p>The official procedure specifies the DRBIII\u00ae scan tool for VIN and mileage programming, though a pre\u2011programmed Flagship One unit bypasses this step.<\/p>\n<h3>What trouble code indicates a communication failure in the PCM of a 2003 Chrysler Concorde?<\/h3>\n<p>Code P0601 is logged when the powertrain control module does not respond to diagnostic requests.<\/p>\n<h3>Is it necessary to disconnect the battery before removing the PCM on a 2003 Chrysler Concorde?<\/h3>\n<p>Disconnecting the negative battery cable is recommended to prevent electrical shorts during removal and reprogramming.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When the PCM or ECM in your 2003 Chrysler Concorde needs attention, you can choose a brand\u2011new factory\u2011programmed unit or a refurbished replacement that meets original specifications. Both options require the same removal steps, but a Flagship One unit arrives with the VIN already loaded, eliminating the need for on\u2011site programming and reducing shop time. Evaluate the condition of your vehicle and decide which path best fits your schedule and budget.<\/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\/jeep4plugblack\/jeep-4plugblack-1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 2003 Chrysler Concorde\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2003 Chrysler Concorde from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2003-chrysler-concorde-2-7l-engine-computer-pcm-ecm-ecu-programmed.html\"><b>refurbished, VIN-programmed PCM for the 2003 Chrysler Concorde<\/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\/concorde-engine-computers.html\">Chrysler Concorde module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<p>The 2003 Chrysler Concorde relies on its PCM and ECM to keep the engine and transmission running smoothly. Proper removal, VIN\u2011programmed replacement, and post\u2011install relearn ensure reliable performance. Contact a qualified technician to assess your module and choose the right solution for lasting drivability.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>If your 2003 Chrysler Concorde shows no\u2011start or erratic engine behavior, beware of PCM\/ECM failure. Proper removal and VIN\u2011programming restores performance.<\/p>\n","protected":false},"author":1,"featured_media":525485,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,263],"tags":[388,56,894],"class_list":["post-532735","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-chrysler","tag-388","tag-chrysler","tag-concorde"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2003 Chrysler Concorde PCM and ECM 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\/2003-chrysler-concorde-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2003 Chrysler Concorde PCM and ECM Replacement Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"If your 2003 Chrysler Concorde shows no\u2011start or erratic engine behavior, beware of PCM\/ECM failure. 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