{"id":535087,"date":"2026-07-17T18:12:49","date_gmt":"2026-07-17T22:12:49","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=535087"},"modified":"2026-07-17T18:12:49","modified_gmt":"2026-07-17T22:12:49","slug":"1999-plymouth-prowler-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/1999-plymouth-prowler-pcm-replacement-guide\/","title":{"rendered":"1999 Plymouth Prowler 3.5L PCM ECM Replacement Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>1999 Plymouth Prowler 3.5L PCM ECM Replacement Guide<\/h1>\n<p class=\"hero-subtitle\">The Powertrain Control Module (PCM) in the 1999 Plymouth Prowler manages engine and transmission functions. Failure can cause drivability problems, no-start conditions, and stored trouble codes such as P0600 series internal faults.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>PCM removal and replacement has a book time of 0.5 hours.<\/li>\n<li>A PCM relearn procedure also takes 0.5 hours after installation.<\/li>\n<li>Factory programming requires a DRB scan tool to enter the VIN and original mileage.<\/li>\n<li>Chrysler TSB #18-037-05 covers flash programming failure recovery using the DRBIII.<\/li>\n<li>Documented internal trouble codes include P0600, P0601, P0622, P0645, P1682, P1683, P1687, P1695, P1696, P1697, and P1698.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If you own a 1999 Plymouth Prowler with the 3.5L engine and are experiencing drivability issues, the Powertrain Control Module (PCM) may be at fault. This guide explains what the PCM does in your Prowler, where it is located, and what the factory replacement procedure involves. You will learn the common symptoms of a failing PCM, the required programming steps, and how a pre-programmed replacement can simplify the job. The information here is based on factory labor times, service bulletins, and documented trouble codes specific to this vehicle.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 1999 Plymouth Prowler<\/h2>\n<p>The Powertrain Control Module (PCM) in the 1999 Plymouth Prowler is the central computer that controls the 3.5L engine and the automatic transmission. It receives sensor inputs for throttle position, crankshaft speed, oxygen levels, and more, then adjusts fuel delivery, ignition timing, and shift points. When the PCM fails, the vehicle may not start, run poorly, or store diagnostic trouble codes. For owners seeking <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/plymouth-pcm-ecm-ecu-engine-computer\/prowler-engine-computers.html\">replacement PCMs for the Prowler<\/a>, understanding the module&#8217;s role is essential for correct diagnosis and repair.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The provided labor facts list a book time of 0.5 hours for both the Engine Control Module and the Powertrain Control Module removal and replacement. No specific physical location is given in the available data. Replacement involves disconnecting the battery, unbolting the module, and disconnecting its wiring harness. After installation, a PCM relearn procedure is required, also book time 0.5 hours. Ensure the ignition is off and the battery is disconnected before handling the module to avoid electrical damage.<\/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\/1999-plymouth-prowler-pcm-service-figure.webp\" alt=\"1999 Plymouth Prowler PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">From the factory PCM removal procedure for the 1999 Plymouth Prowler.<\/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 1999 Plymouth Prowler<\/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> body side panel.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> 3 bolts from PCM bracket.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> PCM 2 40-way connectors powertraincontrolair.<\/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\">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 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\">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\">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<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>After installing a new PCM, the factory procedure requires using a DRB scan tool to reprogram the module with the vehicle&#8217;s original VIN and mileage. This step is critical for proper communication with the immobilizer and other systems. Flagship One supplies <a href=\"https:\/\/www.fs1inc.com\/1999-plymouth-prowler-3-5l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement PCM<\/a> that arrives with the correct VIN and mileage already loaded, so the DRB reprogramming step is eliminated. You only need to perform the relearn procedure after installation.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM in the 1999 Plymouth Prowler can cause a no-start condition, intermittent stalling, rough idle, or poor acceleration. You may also notice the check engine light illuminated with codes such as <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">internal control module fault<\/a>. Transmission shifting may become erratic or harsh. The scan tool may fail to communicate with the module. Other symptoms include misfire codes, fuel trim issues, and the vehicle entering a limp-home mode. Addressing these symptoms promptly can prevent further drivability problems.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 1999 Plymouth Prowler<\/h2>\n<p>The following trouble codes are stored internally within the PCM and indicate specific failures. They are documented for the 1999 Plymouth Prowler and can help diagnose module-related issues.<\/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\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0622-generator-fieldf-terminal-circuit\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0622<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0622-generator-fieldf-terminal-circuit\/\" 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-p0622-generator-fieldf-terminal-circuit\/\" style=\"color:#0563C1\"><b><u>Full P0622 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-p0645-ac-clutch-relay-control-circuit\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0645<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0645-ac-clutch-relay-control-circuit\/\" 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-p0645-ac-clutch-relay-control-circuit\/\" style=\"color:#0563C1\"><b><u>Full P0645 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-p1682-metering-oil-pump-malfunction\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P1682<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p1682-metering-oil-pump-malfunction\/\" 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-p1682-metering-oil-pump-malfunction\/\" style=\"color:#0563C1\"><b><u>Full P1682 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-p1683-control-module-fault\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P1683<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p1683-control-module-fault\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Control module fault<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p1683-control-module-fault\/\" style=\"color:#0563C1\"><b><u>Full P1683 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>P1687<\/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>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<p>Chrysler issued Technical Service Bulletin #18-037-05, titled &#8216;Flash Programming Failure Recovery Using DRBIII\u00ae&#8217;. This bulletin provides a recovery procedure if a PCM programming attempt fails during a flash update. It applies to the 1999 Plymouth Prowler and other Chrysler vehicles of the era. The bulletin outlines steps to restore communication and complete the programming using the DRBIII scan tool.<\/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\">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<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 1999 Plymouth Prowler<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Maintain the charging system; a failing alternator can send voltage spikes that damage the PCM.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep battery and chassis grounds clean and tight to ensure stable voltage reference.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting with a running donor vehicle; connect cables only with both engines off.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address diagnostic trouble codes promptly, especially P0600-series internal faults.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect PCM connector seals for corrosion or moisture intrusion and replace if damaged.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>Can I replace the PCM in my 1999 Plymouth Prowler myself?<\/h3>\n<p>Yes, if you have basic mechanical skills. The book time for removal and replacement is 0.5 hours. You will need to disconnect the battery, unbolt the module, and unplug the harness. After installation, a relearn procedure is required.<\/p>\n<h3>What does the DRB scan tool do for the 1999 Plymouth Prowler PCM?<\/h3>\n<p>The DRB scan tool is used by the factory to program the new PCM with the vehicle&#8217;s VIN and original mileage. This step is necessary for the module to communicate with the vehicle&#8217;s security and other systems.<\/p>\n<h3>Will a used PCM from another 1999 Prowler work in my car?<\/h3>\n<p>A used PCM may work, but it must be reprogrammed with your vehicle&#8217;s VIN and mileage using a DRB scan tool. Without that, the module may not start the engine or may cause security issues.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When your 1999 Plymouth Prowler&#8217;s PCM fails, you have options: repair the original module or replace it with a refurbished unit. Replacement is often more reliable, especially if the module has internal faults. Flagship One offers pre-programmed PCMs that arrive ready to install, saving you the DRB programming step. This model-specific solution ensures compatibility with your 3.5L engine and transmission.<\/p>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/1999-plymouth-prowler-3-5l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 1999 Plymouth Prowler<\/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\/prowler-engine-computers.html\">Plymouth Prowler 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 1999 Plymouth Prowler 3.5L relies on its PCM for engine and transmission control. Recognizing symptoms like no-start or shifting issues and understanding the replacement procedure can help you get back on the road. A pre-programmed replacement from Flagship One simplifies the job by eliminating the factory DRB programming step.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>If your 1999 Plymouth Prowler 3.5L has no-start or transmission issues, the PCM may need replacement. Learn symptoms, location, and programming requirements.<\/p>\n","protected":false},"author":1,"featured_media":526039,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,284],"tags":[52,57,1501],"class_list":["post-535087","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-plymouth","tag-52","tag-plymouth","tag-prowler"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>1999 Plymouth Prowler 3.5L PCM 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\/1999-plymouth-prowler-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1999 Plymouth Prowler 3.5L PCM ECM Replacement Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"If your 1999 Plymouth Prowler 3.5L has no-start or transmission issues, the PCM may need replacement. 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