{"id":535057,"date":"2026-07-17T18:11:36","date_gmt":"2026-07-17T22:11:36","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=535057"},"modified":"2026-07-17T18:11:36","modified_gmt":"2026-07-17T22:11:36","slug":"1994-plymouth-sundance-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/1994-plymouth-sundance-pcm-replacement-guide\/","title":{"rendered":"1994 Plymouth Sundance PCM\/ECM Replacement and Programming Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>1994 Plymouth Sundance PCM\/ECM Replacement and Programming Guide<\/h1>\n<p class=\"hero-subtitle\">In your 1994 Plymouth Sundance with the 2.2L engine, the powertrain control module (PCM) manages fuel injection, ignition timing, and emissions controls. This pre-OBD-II unit communicates with sensors and actuators to keep the engine running. When the PCM fails, it can cause no-start, stalling, or erratic performance, often requiring replacement.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>The PCM in your 1994 Plymouth Sundance controls engine functions and is located near the connector next to the module.<\/li>\n<li>Factory book time for PCM removal and replacement is 0.5 hours, and the relearn procedure also takes 0.5 hours.<\/li>\n<li>A service bulletin (18-037-05) covers flash programming failure recovery using the DRBIII scan tool.<\/li>\n<li>Flagship One supplies VIN-programmed PCMs that arrive ready to install, eliminating the need for a factory relearn.<\/li>\n<li>Common failure symptoms include no-start, stalling, misfire, and loss of communication with a scan tool.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 1994 Plymouth Sundance with the 2.2L engine is experiencing starting problems, stalling, or erratic running, the powertrain control module (PCM) may be at fault. The PCM is the brain of the engine management system, controlling fuel delivery, ignition timing, and emissions. This guide explains what the PCM does in your Sundance, where it is located, and what replacement involves. You will learn about common failure symptoms, the factory service bulletin for flash programming recovery, and how a pre-programmed replacement unit can simplify the repair. The information here is based on factory labor times and service procedures, so you can make an informed decision about repairing or replacing the module.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 1994 Plymouth Sundance<\/h2>\n<p>The powertrain control module (PCM) in your 1994 Plymouth Sundance 2.2L is a pre-OBD-II computer that manages the engine&#8217;s air-fuel mixture, spark timing, and idle speed. It receives input from sensors like the throttle position sensor, coolant temperature sensor, and oxygen sensor, then adjusts actuators such as fuel injectors and the ignition coil. The PCM also controls the transmission shift points on automatic models. When the PCM fails, it can disrupt these functions, leading to poor drivability or a no-start condition. For a reliable replacement, you can choose from <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/plymouth-pcm-ecm-ecu-engine-computer\/sundance-engine-computers.html\">replacement PCMs for the 1994 Plymouth Sundance<\/a> that are pre-programmed to match your vehicle&#8217;s VIN, ensuring plug-and-play installation without the need for a factory relearn.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The PCM in your 1994 Plymouth Sundance is located under the hood, mounted near the passenger side firewall. The connector is positioned next to the powertrain control module itself, as shown in factory diagrams. Accessing the module typically requires removing a cover or bracket. According to factory labor times, removing and replacing the PCM (R&amp;R) is a 0.5-hour job. After installation, a PCM relearn procedure is also listed at 0.5 hours. This relearn involves using a DRBIII scan tool to synchronize the module with the vehicle&#8217;s security and emissions systems. The connector uses spread terminals, so ensure the locking tab is fully engaged to prevent poor contact. No special torque values are specified for the mounting bolts.<\/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\">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 or replacement PCM in your 1994 Plymouth Sundance, the factory procedure requires a relearn using the DRBIII scan tool. This step is necessary to initialize the module and match it to the vehicle&#8217;s VIN and anti-theft system. However, when you purchase <a href=\"https:\/\/www.fs1inc.com\/1994-plymouth-sundance-2-2l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement PCM<\/a> from Flagship One, the unit arrives with your vehicle&#8217;s programming already loaded. This means the factory relearn procedure is already completed, so you can install the module and start the engine without needing a scan tool or dealer visit. The service bulletin 18-037-05 addresses flash programming failure recovery, which may be needed if a programming attempt fails during a dealer-level update.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM in your 1994 Plymouth Sundance 2.2L can cause a range of drivability issues. The most common symptom is a no-start condition where the engine cranks but does not fire. You may also experience intermittent stalling, especially when the engine is warm. Misfires, rough idle, and hesitation during acceleration are typical. The check engine light may illuminate, but since this is a pre-OBD-II vehicle, diagnostic trouble codes are accessed through the DRBIII scan tool rather than generic P-codes. Another sign is a loss of communication with the scan tool during diagnosis. Transmission shifting problems, such as harsh or delayed shifts, can also occur on automatic models. If you notice these symptoms, have the PCM tested before replacing other components.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Factory Service Bulletins Worth Knowing<\/h2>\n<p>Factory service bulletin 18-037-05, titled &#8216;Flash Programming Failure Recovery Using DRBIII\u00ae&#8217;, applies to your 1994 Plymouth Sundance. This bulletin describes a procedure to recover the PCM if a flash programming attempt fails during a dealer-level update. The recovery process uses the DRBIII scan tool to re-establish communication and reload the software. This bulletin is relevant if you are having the PCM reprogrammed at a dealership or if you attempt a DIY flash and encounter an error. Following the steps in this bulletin can prevent the need for a replacement module due to a corrupted program.<\/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 1994 Plymouth Sundance<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Keep the battery and charging system in good condition; voltage spikes from a failing alternator can damage the PCM.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect and clean the PCM ground connections and the main engine ground strap annually to ensure low resistance.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting your vehicle with a running donor car; connect cables only with both engines off to prevent surges.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any diagnostic trouble codes promptly, as ignoring them can lead to PCM stress or failure.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Check the PCM connector seals and wiring harness for corrosion or chafing, especially near the firewall.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use only a quality battery and maintain proper terminal connections to reduce electrical noise.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>How do I know if the PCM in my 1994 Plymouth Sundance is bad?<\/h3>\n<p>Common signs include a no-start condition, stalling, misfiring, or a check engine light that stays on. Since your Sundance is pre-OBD-II, a DRBIII scan tool is needed to retrieve internal codes. If the PCM fails to communicate with the scan tool, that is a strong indicator of a faulty module.<\/p>\n<h3>Can I replace the PCM in my 1994 Plymouth Sundance myself?<\/h3>\n<p>Yes, the replacement is straightforward. The PCM is located under the hood near the passenger side firewall, and the connector is next to the module. Factory book time for removal and replacement is 0.5 hours. After installation, a relearn procedure is required unless you use a pre-programmed unit from Flagship One.<\/p>\n<h3>What is the factory relearn procedure for the 1994 Plymouth Sundance PCM?<\/h3>\n<p>The factory relearn requires a DRBIII scan tool to synchronize the new PCM with the vehicle&#8217;s VIN and anti-theft system. The book time for this procedure is 0.5 hours. However, if you purchase a VIN-programmed PCM from Flagship One, the relearn is already completed, so you can skip this step.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When your 1994 Plymouth Sundance 2.2L needs a PCM, you have two main options: repair the original module or replace it with a refurbished unit. Repairing a failed PCM is often not cost-effective due to the complexity of the circuitry. A refurbished replacement from a trusted supplier like Flagship One offers a reliable solution. These units are tested, VIN-programmed, and ready to install, saving you the time and expense of a dealer relearn. Consider the age of your vehicle and the availability of parts when deciding.<\/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\/jeepgrandcherokee\/jeep-pcm-grandcherokee-1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 1994 Plymouth Sundance\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 1994 Plymouth Sundance from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/1994-plymouth-sundance-2-2l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 1994 Plymouth Sundance<\/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\/sundance-engine-computers.html\">Plymouth Sundance 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 PCM in your 1994 Plymouth Sundance 2.2L is a critical component that controls engine and transmission functions. Recognizing symptoms like no-start or stalling early can prevent further issues. Replacement is a straightforward job with a 0.5-hour book time, and using a VIN-programmed unit from Flagship One eliminates the factory relearn. This approach provides a dependable fix for your Sundance without unnecessary downtime.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>If your 1994 Plymouth Sundance 2.2L has no-start or stalling, the PCM may need replacement. Learn symptoms, location, and programming options for a reliable fix.<\/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":[258,284],"tags":[271,57,1584],"class_list":["post-535057","post","type-post","status-publish","format-standard","hentry","category-car","category-plymouth","tag-271","tag-plymouth","tag-sundance"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>1994 Plymouth Sundance PCM\/ECM Replacement and Programming 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\/1994-plymouth-sundance-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1994 Plymouth Sundance PCM\/ECM Replacement and Programming Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"If your 1994 Plymouth Sundance 2.2L has no-start or stalling, the PCM may need replacement. Learn symptoms, location, and programming options for a reliable fix.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/1994-plymouth-sundance-pcm-replacement-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Flagship One Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/flagshipone\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/flagshipone\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-17T22:11:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fs1inc.com\/media\/wysiwyg\/googleshop\/jeepgrandcherokee\/jeep-pcm-grandcherokee-1.jpg\" \/>\n<meta name=\"author\" content=\"FlagshipOne\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@theflagshipone\" \/>\n<meta name=\"twitter:site\" content=\"@theflagshipone\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"FlagshipOne\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"1994 Plymouth Sundance PCM\\\/ECM Replacement and Programming Guide\",\"datePublished\":\"2026-07-17T22:11:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/\"},\"wordCount\":1393,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/media\\\/wysiwyg\\\/googleshop\\\/jeepgrandcherokee\\\/jeep-pcm-grandcherokee-1.jpg\",\"keywords\":[\"1994\",\"Plymouth\",\"Sundance\"],\"articleSection\":[\"Car\",\"Plymouth\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/\",\"name\":\"1994 Plymouth Sundance PCM\\\/ECM Replacement and Programming Guide - Flagship One Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/media\\\/wysiwyg\\\/googleshop\\\/jeepgrandcherokee\\\/jeep-pcm-grandcherokee-1.jpg\",\"datePublished\":\"2026-07-17T22:11:36+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/media\\\/wysiwyg\\\/googleshop\\\/jeepgrandcherokee\\\/jeep-pcm-grandcherokee-1.jpg\",\"contentUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/media\\\/wysiwyg\\\/googleshop\\\/jeepgrandcherokee\\\/jeep-pcm-grandcherokee-1.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/1994-plymouth-sundance-pcm-replacement-guide\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"1994 Plymouth Sundance PCM\\\/ECM Replacement and Programming Guide\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/\",\"name\":\"Flagship One Blog\",\"description\":\"Flagship One Inc. 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