{"id":535731,"date":"2026-07-18T20:32:30","date_gmt":"2026-07-19T00:32:30","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=535731"},"modified":"2026-07-18T20:32:30","modified_gmt":"2026-07-19T00:32:30","slug":"2020-nissan-murano-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2020-nissan-murano-pcm-replacement-guide\/","title":{"rendered":"2020 Nissan Murano PCM ECM Diagnosis and Replacement Guide Overview"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2020 Nissan Murano PCM ECM Diagnosis and Replacement Guide Overview<\/h1>\n<p class=\"hero-subtitle\">The powertrain control module in the 2020 Nissan Murano manages engine timing, fuel delivery, and transmission shift logic; a loss of internal memory or corrupted software can cause erratic performance, unexpected stalls, or a complete no\u2011start condition under certain driving conditions.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>The PCM and ECM each require about 1.2 hours for removal and installation.<\/li>\n<li>A relearn procedure for the PCM takes roughly 0.5 hours after replacement.<\/li>\n<li>The ECM reset and relearn steps add 0.3 and 0.5 hours respectively.<\/li>\n<li>Internal memory fault code P0605 is documented for this vehicle.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>Owners of a 2020 Nissan Murano who experience sudden stalling, a persistent no\u2011start, or unexplained transmission behavior often trace the problem to the powertrain control module or the engine control module. These computers coordinate fuel injection, ignition timing, and shift scheduling, so a fault can affect drivability across the entire power\u2011train. This guide explains how the modules function in this specific model, what symptoms typically appear when they begin to fail, and which factory service procedures are required after a replacement. It also outlines the labor times published for removal, installation, reset, and relearn operations, giving you a realistic picture of the shop effort involved. By understanding the diagnostic code P0605 and the associated relearn steps, you can decide whether a professional repair, a refurbished unit, or a new VIN\u2011programmed replacement best fits your situation. The information that follows is organized to help you evaluate the problem, communicate effectively with a technician, and avoid unnecessary expense. It also highlights preventive habits that protect the modules from voltage spikes and connector corrosion, which are common contributors to early failure.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2020 Nissan Murano<\/h2>\n<p>The powertrain control module in the 2020 Nissan Murano acts as the central processor for engine management, governing fuel injector pulse width, ignition coil timing, and the electronic throttle position. It also communicates with the transmission control unit to select shift points that match driver demand and engine load. The engine control module, while sometimes integrated, handles the core combustion calculations and monitors sensor inputs such as crankshaft position, camshaft position, and mass airflow. When either module loses its internal calibration \u2014 often due to a corrupted flash memory block \u2014 the vehicle may exhibit rough idle, hesitation under acceleration, or an outright refusal to start. Because the two computers share a high\u2011speed data bus, a fault in one can propagate error codes to the other, complicating diagnosis. Technicians typically verify power and ground integrity, then scan for the specific internal fault code that indicates a memory checksum failure. If replacement is required, the new hardware must be matched to the vehicle identification number so that immobilizer and emissions strategies align; this is why many shops order <a href=\"https:\/\/www.fs1inc.com\/nissan-pcm-ecm-ecu-engine-computer\/murano-engine-computers.html\">replacement engine computers for the Murano<\/a> that arrive pre\u2011configured. Proper installation also demands that the mounting brackets, connector seals, and torque specifications be observed to prevent future water ingress or vibration\u2011induced solder cracks. The module housing is sealed against moisture, and the connector pins are gold\u2011plated to reduce resistance, yet prolonged exposure to road salt can still degrade the interface over time.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The service manual lists a removal and installation time of 1.2 hours for the powertrain control module and the same 1.2 hours for the engine control module. After the hardware is swapped, a powertrain control module relearn requires an additional 0.5 hours, while the engine control module needs a reset of 0.3 hours followed by a relearn of 0.5 hours. These book times assume the technician has clear access to the mounting bolts and the electrical connectors, and that the necessary scan tool is available for the relearn procedures. No special torque values are published for the module brackets, but the standard fastener torque for the engine bay should be observed. Because the modules sit behind the dashboard and under the hood in close proximity to the battery, the technician must disconnect the negative cable before beginning work to avoid voltage spikes. The total shop effort will depend on how quickly the connectors release and whether any corrosion must be cleaned before the new unit is seated.<\/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\/2020-nissan-murano-pcm-service-figure-scaled.webp\" alt=\"2020 Nissan Murano PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">From the factory PCM removal procedure for the 2020 Nissan Murano.<\/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 2020 Nissan Murano<\/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> front air duct.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> battery.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> the harness connectors from ECM.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> ECM nuts.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> the ECM.<\/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\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">1.2 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<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\">1.2 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Reset<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">All configurations<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.3 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\">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 a module is installed, the factory service procedure calls for a powertrain control module relearn that takes roughly 0.5 hours and an engine control module reset of 0.3 hours followed by a relearn of 0.5 hours. The scan tool must be connected to the vehicle data link connector, and the technician initiates the relearn sequence so the new computer can learn the current sensor calibrations and transmission adaptives. If the replacement hardware arrives already matched to the vehicle identification number, the relearn steps are still required but the immobilizer and emissions parameters are already synchronized, reducing the chance of a post\u2011install fault code. Flagship One ships <a href=\"https:\/\/www.fs1inc.com\/2020-nissan-murano-3-5l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN\u2011programmed replacement unit<\/a> that has been flashed with the correct VIN data, so the technician can proceed directly to the relearn without first performing a full flash. This approach shortens shop time and eliminates the risk of loading an incorrect calibration file, which could otherwise cause drivability complaints or a check\u2011engine light.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>Drivers of the 2020 Nissan Murano may notice a sudden loss of power while cruising, an engine that cranks but refuses to fire, or a transmission that holds a gear longer than expected. Intermittent stalling at idle, rough idle with fluctuating RPM, and a check\u2011engine light that appears without a clear pattern are also common when the powertrain control module or engine control module begins to degrade. In many cases the scan tool will report a communication timeout with the module, indicating that the internal processor is no longer responding to requests. A specific internal fault code \u2014 <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0605-internal-control-module-read-only-memory-rom-error\/\">internal memory checksum error P0605<\/a> \u2014 points to a corrupted flash memory block inside the computer. When this code is present, the vehicle may also exhibit erratic fuel trim values, misfire counters that increment without a mechanical cause, and a failure to enter closed\u2011loop operation after warm\u2011up. Because the modules control both engine and transmission strategies, symptoms can cross systems, producing harsh shifts, delayed engagement, or a complete loss of shift functionality. Voltage spikes from a weak alternator or a poorly executed jump\u2011start often accelerate the failure, so the symptoms may appear shortly after a battery service. Recognizing these signs early allows a technician to confirm the module fault before unnecessary component replacement.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2020 Nissan Murano<\/h2>\n<p>The following table lists the module\u2011internal diagnostic trouble codes recorded for the 2020 Nissan Murano. Each entry identifies a specific fault condition inside the powertrain or engine control computer, helping technicians pinpoint whether the issue stems from memory corruption, processor failure, or communication loss before any hardware is swapped.<\/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-p0605-internal-control-module-read-only-memory-rom-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0605<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0605-internal-control-module-read-only-memory-rom-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal ROM error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0605-internal-control-module-read-only-memory-rom-error\/\" style=\"color:#0563C1\"><b><u>Full P0605 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 2020 Nissan Murano<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Keep the charging system in good condition; a weak alternator can send voltage spikes that damage module circuitry.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect and clean all ground straps and connector pins regularly to prevent resistance buildup.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump\u2011starting with reversed polarity or excessive current; use a proper jump\u2011starter or charger.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any stored trouble codes promptly rather than ignoring them, as lingering faults can stress the processor.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Ensure the module connector seals remain intact to keep moisture and road salt out of the housing.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use only manufacturer\u2011specified torque when reinstalling mounting brackets to avoid mechanical stress on the circuit board.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>What are the typical labor hours for replacing the powertrain control module on a 2020 Nissan Murano?<\/h3>\n<p>The service manual allocates 1.2 hours for removal and installation, plus an additional 0.5 hours for the required relearn procedure.<\/p>\n<h3>Does the engine control module on a 2020 Nissan Murano require a separate reset after installation?<\/h3>\n<p>Yes, the factory procedure calls for a 0.3 hour reset followed by a 0.5 hour relearn once the new module is in place.<\/p>\n<h3>Can a P0605 code on a 2020 Nissan Murano be cleared without replacing the module?<\/h3>\n<p>The code indicates an internal memory checksum failure; clearing it will not repair the underlying hardware fault, so the module usually needs replacement.<\/p>\n<h3>Are Flagship One replacement modules for the 2020 Nissan Murano pre\u2011programmed to the vehicle VIN?<\/h3>\n<p>Flagship One units ship with the correct VIN flashed, allowing the technician to skip the initial flash and proceed directly to the relearn steps.<\/p>\n<h3>What preventive maintenance helps extend the life of the Murano\u2019s control modules?<\/h3>\n<p>Maintaining a healthy alternator, keeping ground connections clean, avoiding improper jump\u2011starts, and protecting connector seals from moisture all reduce the risk of early module failure.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When the powertrain or engine control module on a 2020 Nissan Murano fails, you can choose a professional repair of the existing unit, a refurbished module that has been tested and re\u2011flashed, or a new VIN\u2011matched replacement that arrives ready for the required relearn. Each path carries different cost and warranty considerations, and the decision often depends on how quickly the vehicle must return to service. Discuss the labor times and code history with your technician to select the most practical solution.<\/p>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2020-nissan-murano-3-5l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2020 Nissan Murano<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/nissan-pcm-ecm-ecu-engine-computer\/murano-engine-computers.html\">Nissan Murano module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<p>Understanding the role of the powertrain and engine control modules in the 2020 Nissan Murano helps you recognize early warning signs and communicate effectively with a repair shop. By following the factory relearn procedures and considering a VIN\u2011programmed replacement, you can restore reliable drivability with minimal downtime. If you need further guidance on module diagnostics or replacement options, consult a qualified technician familiar with this model.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>2020 Nissan Murano may no\u2011start or stall when the PCM fails; ignoring the code risks drivetrain damage, while proper diagnosis restores reliable operation.<\/p>\n","protected":false},"author":1,"featured_media":526025,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,98],"tags":[676,857,412],"class_list":["post-535731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-nissan","tag-676","tag-murano","tag-nissan"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2020 Nissan Murano PCM ECM Diagnosis and Replacement Guide Overview - 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\/2020-nissan-murano-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2020 Nissan Murano PCM ECM Diagnosis and Replacement Guide Overview - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"2020 Nissan Murano may no\u2011start or stall when the PCM fails; ignoring the code risks drivetrain damage, while proper diagnosis restores reliable operation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fs1inc.com\/blog\/2020-nissan-murano-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=\"2026-07-19T00:32:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/07\/2020-nissan-murano-pcm-service-figure-scaled.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1737\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\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=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/\"},\"author\":{\"name\":\"FlagshipOne\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#\\\/schema\\\/person\\\/a3cf463514bd03eb7656953ef8f75700\"},\"headline\":\"2020 Nissan Murano PCM ECM Diagnosis and Replacement Guide Overview\",\"datePublished\":\"2026-07-19T00:32:30+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/\"},\"wordCount\":1730,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/2020-nissan-murano-pcm-service-figure-scaled.webp\",\"keywords\":[\"2020\",\"murano\",\"Nissan\"],\"articleSection\":[\"Car\",\"Nissan\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/\",\"url\":\"https:\\\/\\\/www.fs1inc.com\\\/blog\\\/2020-nissan-murano-pcm-replacement-guide\\\/\",\"name\":\"2020 Nissan Murano PCM ECM Diagnosis and Replacement Guide Overview - 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