{"id":528401,"date":"2026-07-17T01:59:22","date_gmt":"2026-07-17T05:59:22","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=528401"},"modified":"2026-07-17T01:59:22","modified_gmt":"2026-07-17T05:59:22","slug":"2007-mitsubishi-eclipse-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2007-mitsubishi-eclipse-pcm-replacement-guide\/","title":{"rendered":"2007 Mitsubishi Eclipse 2.4L PCM ECM Replacement Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2007 Mitsubishi Eclipse 2.4L PCM ECM Replacement Guide<\/h1>\n<p class=\"hero-subtitle\">The Powertrain Control Module (PCM) in automatic-transmission 2007 Mitsubishi Eclipse 2.4L models, or the Engine Control Module (ECM) in manual-transmission versions, is the central computer that manages fuel injection, ignition timing, and transmission control. Failure often causes no-start, stalling, or drivability issues.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>The 2007 Eclipse 2.4L uses either a PCM (A\/T) or ECM (M\/T) that controls engine and transmission functions.<\/li>\n<li>Factory procedure warns against replacing the PCM\/ECM and the ETACS-ECU at the same time; replace one first and register the encrypted code.<\/li>\n<li>ECM removal and replacement book time is 0.4 hours; a PCM relearn adds 0.5 hours after installation.<\/li>\n<li>Common failure symptoms include no-start, stalling, misfire codes, and loss of communication with the scan tool.<\/li>\n<li>Flagship One supplies VIN-programmed units that eliminate the need for dealer-level encrypted code registration.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2007 Mitsubishi Eclipse with the 2.4L engine is experiencing intermittent stalling, a no-start condition, or a check engine light that refuses to go away, the engine computer may be failing. In this vehicle, the primary control module is called the Powertrain Control Module (PCM) on automatic transmission models or the Engine Control Module (ECM) on manual transmission models. This computer is the brain of the engine management system, processing sensor inputs and commanding fuel injectors, ignition coils, and the transmission solenoids. When it fails, the entire vehicle can become undrivable. This article explains what the PCM\/ECM does in your Eclipse, where it is located, how long replacement takes based on factory book times, and what the factory service procedure requires after installation. You will also learn about common failure symptoms, how to protect the module from damage, and why a pre-programmed replacement unit from Flagship One can save you time and money. Understanding these details helps you make an informed decision about repairing or replacing the computer in your 2007 Eclipse.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2007 Mitsubishi Eclipse<\/h2>\n<p>In the 2007 Mitsubishi Eclipse 2.4L, the Powertrain Control Module (PCM) on automatic transmission models or the Engine Control Module (ECM) on manual transmission models is a sealed electronic unit that continuously monitors and controls engine operation. It receives signals from sensors such as the crankshaft position sensor, throttle position sensor, oxygen sensors, and mass airflow sensor. Using these inputs, the module calculates the correct fuel injection pulse width, ignition timing, and idle speed. On automatic transmission versions, the PCM also manages shift timing and torque converter lockup. The module communicates with other vehicle systems over the CAN bus, including the ETACS-ECU (Electronic Time and Alarm Control System) which handles body functions like door locks and security. A critical factory caution states that you must not replace the PCM\/ECM and the ETACS-ECU simultaneously. Instead, replace one of the ECUs first, then register the encrypted code as described in the immobilizer system service information. This prevents immobilizer-related no-start conditions. The module is a <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/mitsubishi-pcm-ecm-ecu-engine-computer\/eclipse-engine-computers.html\">replacement engine computers for the Eclipse<\/a> that directly affects drivability, fuel economy, and emissions. When it fails, the vehicle may not start, may run poorly, or may set diagnostic trouble codes that point to internal processor faults.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What Replacing the PCM Involves<\/h2>\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 2007 Mitsubishi Eclipse<\/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> the ECM or PCM connector cover.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the ECM or PCM bracket.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the ECM or PCM connectors.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the ECM or 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 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\">0.4 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\/ECM in the 2007 Mitsubishi Eclipse 2.4L, the factory procedure requires that you register the encrypted code with the immobilizer system. The service manual explicitly warns against replacing both the PCM\/ECM and the ETACS-ECU at the same time; you must replace one ECU first, then perform the encrypted code registration. This step is critical to ensure the vehicle starts and the security system functions correctly. Without proper registration, the immobilizer may prevent the engine from cranking or starting. Flagship One eliminates this complexity by supplying <a href=\"https:\/\/www.fs1inc.com\/2007-mitsubishi-eclipse-2-4l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement unit<\/a> that arrives with the correct encrypted code already written to the module. This means you can install the unit, perform the PCM relearn procedure, and drive away without needing a dealer scan tool or specialized programming equipment. The VIN programming also ensures that the module is matched to your vehicle&#8217;s specific configuration, including transmission type and emissions calibrations.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>When the PCM or ECM begins to fail in a 2007 Mitsubishi Eclipse 2.4L, you may notice a variety of drivability problems. The most common symptom is a no-start condition where the engine cranks but does not fire, often because the module is not sending fuel injector or ignition commands. Intermittent stalling while driving is another frequent complaint, sometimes accompanied by a sudden loss of power. The check engine light may illuminate with generic or manufacturer-specific trouble codes, such as those indicating internal processor faults or communication errors. You might also experience rough idle, hesitation during acceleration, or poor fuel economy. On automatic transmission models, shifting may become erratic or the transmission may fail to shift properly because the PCM controls shift solenoids. Another telltale sign is that a scan tool cannot communicate with the module, or communication drops out intermittently. If you notice any of these symptoms, it is wise to have the system diagnosed promptly, as a failing module can leave you stranded.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 2007 Mitsubishi Eclipse<\/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; voltage spikes from a failing alternator can damage the PCM\/ECM over time.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep battery terminals and engine ground connections clean and tight to ensure stable voltage to the module.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting the vehicle with a running donor vehicle; connect cables only with both engines off to prevent voltage surges.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any diagnostic trouble codes promptly; ignoring a minor sensor fault can lead to module overload or internal damage.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect the wiring harness connectors at the PCM\/ECM for corrosion, bent pins, or broken locking tabs; reseal if necessary.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Never disconnect or reconnect the battery while the engine is running, as this can create a voltage transient that may harm the module.<\/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 2007 Mitsubishi Eclipse 2.4L myself, or do I need a dealer?<\/h3>\n<p>You can replace the PCM yourself if you have basic mechanical skills. The module is accessible in the engine bay and the book time is 0.4 hours for removal and installation. However, after installation you must perform a PCM relearn procedure (0.5 hours) and, if using a non-programmed unit, register the encrypted code with the immobilizer system. A VIN-programmed unit from Flagship One eliminates the need for dealer programming.<\/p>\n<h3>What happens if I replace both the PCM and the ETACS-ECU at the same time on my 2007 Eclipse?<\/h3>\n<p>The factory service manual explicitly warns against replacing both ECUs simultaneously. Doing so can cause the immobilizer system to lose synchronization, resulting in a no-start condition that may require specialized equipment to resolve. The correct procedure is to replace one ECU first, then register the encrypted code before replacing the other.<\/p>\n<h3>How do I know if my 2007 Eclipse 2.4L has a bad ECM versus a bad sensor?<\/h3>\n<p>A bad ECM often causes multiple seemingly unrelated symptoms, such as no-start, stalling, and loss of scan tool communication. Sensor failures typically produce specific trouble codes and affect only one system. If you have codes like P0601 (internal control module memory) or P0606 (ECM processor fault), the module itself is likely the issue. A professional diagnosis with a scan tool is recommended.<\/p>\n<h3>Is the PCM relearn procedure required after replacing the ECM on a 2007 Mitsubishi Eclipse?<\/h3>\n<p>Yes, the factory labor guide lists a Powertrain Control Module Relearn procedure that takes 0.5 hours. This relearn allows the new module to adapt to the vehicle&#8217;s specific sensors and actuators. It is a necessary step after any ECM or PCM replacement to ensure proper idle quality, fuel trim, and transmission operation.<\/p>\n<h3>Will a used PCM from a salvage yard work in my 2007 Eclipse 2.4L?<\/h3>\n<p>A used PCM may work, but it must be from the same model year, engine, and transmission type. Additionally, the encrypted code must be registered to match your vehicle&#8217;s immobilizer system. Used modules often have unknown history and may fail prematurely. A new or remanufactured VIN-programmed unit from Flagship One is a more reliable option.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When your 2007 Mitsubishi Eclipse 2.4L needs a new PCM or ECM, you have two main options: have a dealer install a factory module with full programming, or choose a remanufactured or new unit that arrives pre-programmed to your VIN. The dealer route can be expensive and time-consuming. Flagship One offers VIN-programmed replacement modules that match your Eclipse&#8217;s exact specifications, including transmission type and emissions calibrations. This approach saves you the cost of dealer programming and gets you back on the road faster.<\/p>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2007-mitsubishi-eclipse-2-4l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2007 Mitsubishi Eclipse<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/chrysler-dodge-plymouth\/mitsubishi-pcm-ecm-ecu-engine-computer\/eclipse-engine-computers.html\">Mitsubishi Eclipse 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 or ECM in your 2007 Mitsubishi Eclipse 2.4L is a critical component that controls engine and transmission operation. When it fails, symptoms like no-start, stalling, and check engine lights are common. Replacement involves 0.4 hours of labor plus a 0.5-hour relearn, and the factory cautions against simultaneous ECU replacement. Flagship One provides VIN-programmed units that simplify the process and eliminate the need for dealer-level encrypted code registration.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Learn about 2007 Mitsubishi Eclipse 2.4L PCM\/ECM failure symptoms, replacement labor times, and the factory caution against simultaneous ECU replacement. Get VIN-programmed units.<\/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":[258,295],"tags":[286,316,296],"class_list":["post-528401","post","type-post","status-publish","format-standard","hentry","category-car","category-mitsubishi","tag-286","tag-eclipse","tag-mitsubishi"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2007 Mitsubishi Eclipse 2.4L 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\/2007-mitsubishi-eclipse-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2007 Mitsubishi Eclipse 2.4L PCM ECM Replacement Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Learn about 2007 Mitsubishi Eclipse 2.4L PCM\/ECM failure symptoms, replacement labor times, and the factory caution against simultaneous ECU replacement. 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