{"id":535077,"date":"2026-07-18T20:48:04","date_gmt":"2026-07-19T00:48:04","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=535077"},"modified":"2026-07-18T20:48:04","modified_gmt":"2026-07-19T00:48:04","slug":"1997-plymouth-voyager-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/1997-plymouth-voyager-pcm-replacement-guide\/","title":{"rendered":"1997 Plymouth Voyager PCM\/ECM Relearn and Replacement"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>1997 Plymouth Voyager PCM\/ECM Relearn and Replacement<\/h1>\n<p class=\"hero-subtitle\">The PCM\/ECM in the 1997 Plymouth Voyager manages engine timing, fuel delivery, and transmission shifts. A failure can trigger misfires, stall, or MIL illumination, compromising drivability.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>PCM\/ECM relearn times are 0.5 hours for both Grand Voyager and Voyager models.<\/li>\n<li>Replacement of the PCM\/ECM requires 0.6 hours of labor.<\/li>\n<li>Powertrain Control Module also shares identical relearn and replacement times.<\/li>\n<li>Service bulletin #18-037-05 addresses flash programming failure recovery.<\/li>\n<li>Service bulletin #18-04-97 covers erroneous MIL illumination with specific hex codes.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>You might notice your 1997 Plymouth Voyager\u2019s check engine light staying on or experiencing unexpected stalls. Those symptoms often point to the vehicle\u2019s Powertrain Control Module (PCM) or Engine Control Module (ECM). This article explains how the PCM\/ECM functions within the Voyager, why it is crucial for engine performance, and what steps you can take to diagnose and remedy failures. By understanding the relearn process, replacement labor, and related service bulletins, you\u2019ll be better equipped to keep your Voyager running smoothly.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 1997 Plymouth Voyager<\/h2>\n<p>The PCM\/ECM in the 1997 Plymouth Voyager serves as the vehicle\u2019s brain, coordinating fuel injection, ignition timing, and transmission shift points to ensure efficient operation. It also monitors sensors and provides diagnostic trouble codes when faults arise. In this model, the PCM\/ECM is tightly integrated with the powertrain, and a failure can lead to loss of power, poor fuel economy, or a persistent check engine light. <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/plymouth-pcm-ecm-ecu-engine-computer\/voyager-engine-computers.html\">Replacement Engine Computers for the Plymouth Voyager<\/a> The module\u2019s health directly affects the vehicle\u2019s ability to maintain proper timing and shift logic, so any malfunction can severely impair drivability.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The PCM\/ECM is located under the hood near the firewall, accessible by removing a few panels and disconnecting the wiring harness. Replacement involves removing the old unit, installing the new one, and reconnecting the harness. The labor schedule lists 0.6 hours for a replacement or 0.5 hours for a relearn for both Grand Voyager and Voyager variants, reflecting the straightforward nature of the operation.<\/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\/1997-plymouth-voyager-pcm-location-diagram.webp\" alt=\"1997 Plymouth Voyager PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">PCM mounting location on the 1997 Plymouth Voyager.<\/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 1997 Plymouth Voyager<\/h3>\n<ol style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> both cables from battery, negative cable first.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> 2 screws holding Power Distribution Center (PDC) to bracket distributioncenter.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> heat shield from battery heatshieldbattery.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> nut and clamp holding battery to battery tray clampnut.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> battery from vehicle.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Rotate<\/b> PDC toward center of vehicle to remove from rear bracket.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Pull<\/b> PDC rearward to remove from front bracket.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> both way connectors.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> 3 screws holding PCM to fender.<\/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\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Grand Voyager<\/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\">Voyager<\/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\">Grand Voyager<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.6 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\">Voyager<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.6 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\">Grand Voyager<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.6 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\">Voyager<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.6 hr<\/td>\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\">Grand Voyager<\/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 Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Voyager<\/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\/ECM, the factory procedure requires a relearn sequence to reinitialize sensor maps and shift logic. Because Flagship One units arrive VIN\u2011programmed, the relearn step is already complete, so you can start driving immediately without performing any additional programming steps. <a href=\"https:\/\/www.fs1inc.com\/1997-plymouth-voyager-2-4l-engine-computer-pcm-ecm-ecu-programmed.html\">a VIN\u2011programmed replacement unit<\/a> for the correct application.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>Common signs of a PCM\/ECM issue in the 1997 Plymouth Voyager include a check engine light that does not turn off, stalling at idle, intermittent misfires, or erratic shifting. You may also see a dead scan\u2011tool connection or a sudden loss of power. If the vehicle records code <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">Engine Control Module Failure<\/a>, it indicates a malfunction in the module\u2019s internal logic that can cause the symptoms described above.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 1997 Plymouth Voyager<\/h2>\n<p>The codes below point to the PCM itself rather than to a sensor or circuit it monitors. Each one links through to its full diagnostic guide.<\/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<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>P1695<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Module-internal fault<\/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>P1696<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Module-internal fault<\/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>P1697<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Module-internal fault<\/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>P1698<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Module-internal fault<\/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>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\"><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<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>18-04-97<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">18-04-97 Erroneous MIL Illumination With Hex Code $29, $2a, $2b<\/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 1997 Plymouth Voyager<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Keep the vehicle\u2019s charging system in good condition to avoid voltage spikes.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect and clean all ground straps and connector pins regularly.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid using a jump starter with a voltage higher than the manufacturer\u2019s recommendation.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Respond promptly to any diagnostic trouble codes to prevent further damage.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Check connector seals and gaskets for leaks or wear.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Maintain proper battery charge and ensure the alternator output is within spec.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>What should I do if my 1997 Plymouth Voyager\u2019s check engine light stays on after a PCM replacement?<\/h3>\n<p>After a PCM replacement, perform a relearn procedure. If the light remains, use a scan tool to read any stored codes. Address any listed codes or consider a diagnostic review of sensor wiring.<\/p>\n<h3>Can I replace the PCM on my own or do I need a professional?<\/h3>\n<p>The PCM is located under the hood and the labor times are modest, but a professional can ensure proper installation, grounding, and relearn. Improper installation can lead to additional faults.<\/p>\n<h3>What is the difference between a PCM relearn and a replacement?<\/h3>\n<p>A relearn adjusts the module\u2019s internal maps to match the vehicle\u2019s current configuration. Replacement involves installing a new unit, which comes pre\u2011programmed in the case of Flagship One products, eliminating the need for relearn steps.<\/p>\n<h3>How long does a PCM replacement take on a 1997 Plymouth Voyager?<\/h3>\n<p>The labor schedule lists 0.6 hours for a replacement, reflecting the relatively quick removal and installation process.<\/p>\n<h3>Will a new PCM fix all engine performance issues?<\/h3>\n<p>A new PCM can resolve many control\u2011related issues, but if sensor wiring or mechanical components are faulty, additional repairs may be required.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>You now have a clear view of what the PCM\/ECM does, how to handle its replacement, and what to watch for during diagnostics. Whether you choose to repair your existing module or opt for a refurbished replacement, understanding the process and the benefits of a pre\u2011programmed unit can help you make an informed decision for your 1997 Plymouth Voyager.<\/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 1997 Plymouth Voyager\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 1997 Plymouth Voyager from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/1997-plymouth-voyager-2-4l-engine-computer-pcm-ecm-ecu-programmed.html\"><b>refurbished, VIN-programmed PCM for the 1997 Plymouth Voyager<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/plymouth-pcm-ecm-ecu-engine-computer\/voyager-engine-computers.html\">Plymouth Voyager 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 1997 Plymouth Voyager\u2019s PCM\/ECM is essential for engine performance and reliability. By following the steps outlined and staying alert to warning lights, you can keep your vehicle operating smoothly. If you encounter persistent issues, consider a professional inspection or a reliable replacement unit.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>If your 1997 Plymouth Voyager shows a MIL or stalling, the PCM\/ECM may need relearn or replacement. Learn how to troubleshoot and avoid costly repairs.<\/p>\n","protected":false},"author":1,"featured_media":520725,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,284],"tags":[78,57,564],"class_list":["post-535077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-plymouth","tag-78","tag-plymouth","tag-voyager"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>1997 Plymouth Voyager PCM\/ECM Relearn and Replacement - 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\/1997-plymouth-voyager-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1997 Plymouth Voyager PCM\/ECM Relearn and Replacement - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"If your 1997 Plymouth Voyager shows a MIL or stalling, the PCM\/ECM may need relearn or replacement. 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