{"id":531102,"date":"2026-07-17T11:00:26","date_gmt":"2026-07-17T15:00:26","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=531102"},"modified":"2026-07-17T11:00:26","modified_gmt":"2026-07-17T15:00:26","slug":"2006-infiniti-fx35-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2006-infiniti-fx35-pcm-replacement-guide\/","title":{"rendered":"2006 Infiniti FX35 PCM\/ECM: Symptoms, Replacement, and Reprogramming"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2006 Infiniti FX35 PCM\/ECM: Symptoms, Replacement, and Reprogramming<\/h1>\n<p class=\"hero-subtitle\">The Powertrain Control Module (PCM) or Engine Control Module (ECM) in the 2006 Infiniti FX35 manages engine timing, fuel delivery, and emissions. Failure can cause no-start, stalling, or check engine light. Common codes include P0605.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>The 2006 Infiniti FX35 uses a PCM\/ECM that controls engine performance and transmission operation.<\/li>\n<li>Replacement of the module requires 0.6 hours of labor plus an additional 0.5 hours for a relearn procedure.<\/li>\n<li>A common failure code, P0605, indicates an internal ECM fault that may require module replacement.<\/li>\n<li>Factory service bulletins provide reprogramming and diagnosis procedures for related engine control issues.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2006 Infiniti FX35 with the 3.5L engine is experiencing drivability problems such as stalling, rough idling, or a persistent check engine light, the Powertrain Control Module (PCM) or Engine Control Module (ECM) may be at fault. This article explains what the PCM\/ECM does in your FX35, common failure symptoms, the replacement process including labor times, and what to expect after installation. You will also learn about relevant factory service bulletins and the specific trouble code P0605 that points to internal module failure. Understanding these details helps you make an informed decision about repair or replacement, saving time and money.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2006 Infiniti FX35<\/h2>\n<p>The 2006 Infiniti FX35 is equipped with a combined Powertrain Control Module (PCM) that integrates engine and transmission control functions. This module processes sensor inputs for throttle position, oxygen levels, coolant temperature, and crankshaft speed to calculate fuel injection timing, ignition spark advance, and shift points. When the PCM fails, it can disrupt these critical operations, leading to poor fuel economy, hesitation, or even a no-start condition. The FX35\u2019s PCM is also responsible for monitoring emissions systems and storing diagnostic trouble codes. If you need a replacement, look for <a href=\"https:\/\/www.fs1inc.com\/nissan-pcm-ecm-ecu-engine-computer\/infiniti-pcm-ecm-ecu-engine-computer\/fx35-engine-computers.html\">replacement engine computers for the Infiniti FX35<\/a> that are properly calibrated for your specific VIN to ensure optimal performance.<\/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 in the 2006 Infiniti FX35 is typically located in the engine compartment, mounted on the passenger side firewall near the strut tower. Accessing the module requires removing the battery and battery tray to reach the mounting bolts. The labor time for removal and replacement (R&amp;R) is 0.6 hours as per factory guidelines. After the new module is installed, an additional 0.5 hours is needed for a Powertrain Control Module Relearn, which synchronizes the module with the vehicle\u2019s throttle and transmission adaptations. It is important to disconnect the battery negative terminal before starting work and to handle the module carefully to avoid damaging connectors.<\/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\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">FX35<\/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\">FX45<\/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\">FX35<\/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\">FX45<\/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 Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">FX35<\/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\">FX45<\/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\">FX35<\/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\">FX45<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.6 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>After replacing the PCM\/ECM in your 2006 Infiniti FX35, the factory procedure often requires a reprogramming step using the Nissan Consult-III system, as outlined in service bulletin ITB09019. This process updates the module software and performs a relearn of idle and throttle position. Without this step, the engine may run poorly or trigger false codes. Fortunately, <a href=\"https:\/\/www.fs1inc.com\/2006-infiniti-fx35-3-5l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement unit<\/a> from Flagship One arrives with your vehicle\u2019s specific calibration already loaded, so the reprogramming and relearn are already completed. This saves you the 0.5-hour relearn labor and ensures the module is ready to drive immediately after installation.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM\/ECM in the 2006 Infiniti FX35 can cause a variety of symptoms. The engine may crank but not start, or it may start and stall unpredictably. You might notice rough idling, misfires, or a sudden loss of power while driving. The check engine light often illuminates, and scanning the system may reveal a <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0605-internal-control-module-read-only-memory-rom-error\/\">internal ECM fault P0605<\/a> that indicates the module itself has failed. Other symptoms include poor fuel economy, transmission shifting harshness or erratic behavior, and the inability to communicate with the scan tool during diagnostics. These issues can be intermittent at first, but they typically worsen, making replacement necessary to restore reliable operation.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2006 Infiniti FX35<\/h2>\n<p>For the 2006 Infiniti FX35, the following module-internal trouble code has been documented and is directly related to PCM\/ECM failure:<\/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>Factory Service Bulletins Worth Knowing<\/h2>\n<p>Several factory service bulletins address engine control system issues for the 2006 Infiniti FX35 and related models. ITB09019 provides the Consult-III ECM reprogramming procedure to update module software. ITB09006 outlines a diagnosis procedure for a MIL-on condition with DTC P0603, which relates to ECM power supply problems. ITB11026 applies to 2007-2008 FX45 vehicles with MIL-on and DTC P1421 stored, but its reprogramming techniques may be relevant for earlier models experiencing similar symptoms. These bulletins emphasize the importance of proper diagnosis and software updates before replacing the module.<\/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\">&mdash;<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">EC &#8211; ENGINE CONTROL SYSTEM: CONSULT-III ECM REPROGRAMMING PROCEDURE<\/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\">&mdash;<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">EC &#8211; ENGINE CONTROL SYSTEM: DIAGNOSIS PROCEDURE FOR MIL &amp;#x201c;ON&amp;#x201d; DTC P0603 ECM POWER <\/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\">&mdash;<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">EC &#8211; ENGINE CONTROL SYSTEM: 2007-2008 FX45; MIL &#8216;ON&#8217; WITH DTC P1421 STORED<\/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 2006 Infiniti FX35<\/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; test the battery and alternator regularly to prevent voltage spikes that can damage the PCM.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep all ground connections and module harness connectors clean and tight to ensure reliable electrical contact.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting the vehicle with a high-voltage source; use a quality battery charger or jump starter with surge protection.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any check engine light codes promptly, especially those related to the ECM power supply or internal faults.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect the PCM connector seals for cracks or moisture intrusion, as water damage is a common cause of failure.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use only quality fuel and replace the engine air filter as recommended to reduce load on the engine control system.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>When your 2006 Infiniti FX35\u2019s PCM\/ECM fails, you have the option of repairing the existing module or replacing it with a new or refurbished unit. Because internal faults like P0605 often require component-level repair that is not always reliable, many owners choose a direct replacement. A refurbished PCM from a trusted supplier ensures your vehicle returns to proper operation without the hassle of reprogramming.<\/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\/nissancombo\/nissan-ns-h20b-ns-h20c-1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 2006 Infiniti FX35\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2006 Infiniti FX35 from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2006-infiniti-fx35-3-5l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2006 Infiniti FX35<\/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\/infiniti-pcm-ecm-ecu-engine-computer\/fx35-engine-computers.html\">Infiniti FX35 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 2006 Infiniti FX35 relies on its PCM\/ECM for smooth engine and transmission operation. Recognizing failure symptoms such as code P0605 and understanding the replacement process helps you maintain your vehicle\u2019s reliability. Flagship One offers VIN-programmed modules that simplify the repair, getting you back on the road quickly.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Learn about 2006 Infiniti FX35 PCM\/ECM failure symptoms, replacement labor times, and reprogramming. Avoid costly repairs with proper diagnosis from a trusted supplier.<\/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":[258,319],"tags":[393,941,320],"class_list":["post-531102","post","type-post","status-publish","format-standard","hentry","category-car","category-infiniti","tag-393","tag-fx35","tag-infiniti"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2006 Infiniti FX35 PCM\/ECM: Symptoms, Replacement, and Reprogramming - 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\/2006-infiniti-fx35-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2006 Infiniti FX35 PCM\/ECM: Symptoms, Replacement, and Reprogramming - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"Learn about 2006 Infiniti FX35 PCM\/ECM failure symptoms, replacement labor times, and reprogramming. 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