{"id":531551,"date":"2026-07-17T13:25:15","date_gmt":"2026-07-17T17:25:15","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=531551"},"modified":"2026-07-19T12:00:44","modified_gmt":"2026-07-19T16:00:44","slug":"2005-jeep-liberty-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2005-jeep-liberty-pcm-replacement-guide\/","title":{"rendered":"2005 Jeep Liberty Powertrain Control Module Overview"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2005 Jeep Liberty Powertrain Control Module Overview<\/h1>\n<p class=\"hero-subtitle\">The Powertrain Control Module in a 2005 Jeep Liberty manages engine and transmission functions. When it fails, the vehicle may lose power, stall, or refuse to start, and diagnostic trouble codes such as P0601 can appear, indicating internal communication problems.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>PCM controls both engine and transmission operations.<\/li>\n<li>Typical failure signs include no\u2011start, rough idle, and shift anomalies.<\/li>\n<li>Diagnostic codes like P0601 often point to PCM internal faults.<\/li>\n<li>Replacement usually requires 0.5\u202fhours of labor.<\/li>\n<li>Factory programming is needed after installation.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>When a 2005 Jeep Liberty begins to exhibit intermittent power loss, erratic shifting, or a complete no\u2011start condition, the Powertrain Control Module may be at fault. Understanding what this computer does, where it lives, and how it is serviced can help you decide whether to repair or replace it. This guide explains the module\u2019s role, typical symptoms, labor requirements, and what to expect from a factory\u2011programmed replacement.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2005 Jeep Liberty<\/h2>\n<p>In the 2005 Jeep Liberty the Powertrain Control Module acts as the brain for both the engine and transmission, processing sensor data and controlling fuel, ignition, and gear\u2011change commands. Its reliability is essential for smooth operation, and a malfunction can trigger a range of drivability issues. The module is part of the vehicle\u2019s broader electronic control system, and replacement options often involve <a href=\"https:\/\/www.fs1inc.com\/jeep-ecu-ecm-pcm\/liberty-engine-computers.html\">2005 Jeep Liberty replacement PCM<\/a> that match the original specifications.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Where the PCM Is Located and What Replacement Involves<\/h2>\n<p>The PCM sits in the engine compartment of the 2005 Jeep Liberty, accessible without removing major components. Removing the unit typically takes about half an hour of labor, as indicated by the book time of 0.5\u202fhours. Installation follows the same time frame, requiring connection of the wiring harness and securing the module in its bracket. No additional torque specifications were provided, so standard fastener tightening practices apply.<\/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\/2005-jeep-liberty-pcm-location-diagram.webp\" alt=\"2005 Jeep Liberty PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">PCM mounting location on the 2005 Jeep Liberty.<\/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 2005 Jeep Liberty<\/h3>\n<ol style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> negative battery cable.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> ECM electrical connectors (ENGINE CONTROL MODULE (ECM) REMOVAL\/INSTALL).<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> ECM bracket to inner fender retaining nuts (ENGINE CONTROL MODULE (ECM) REMOVAL\/INSTALL).<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> ECM and bracket assembly from vehicle (ENGINE CONTROL MODULE (ECM) REMOVAL\/INSTALL).<\/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 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 R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">2.4L<\/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\">3.7L<\/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\">2.8L<\/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\">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\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">2.4L<\/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\">3.7L<\/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 PCM swap, the factory procedure calls for a relearn of the Powertrain Control Module, which takes roughly 0.5\u202fhours. Flagship One supplies a <a href=\"https:\/\/www.fs1inc.com\/2005-jeep-liberty-3-7l-engine-computer-pcm-ecm-ecu-programmed.html\">a VIN-programmed replacement unit<\/a> that arrives already calibrated, eliminating the need for post\u2011install programming steps.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>A failing PCM in a 2005 Jeep Liberty often leads to a no\u2011start condition, rough idle, or erratic shifting, and the scan tool may lose communication with the vehicle. You might also see diagnostic trouble codes such as <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">communication error<\/a> indicating internal module failure. These symptoms typically appear gradually as the module\u2019s internal circuitry degrades.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2005 Jeep Liberty<\/h2>\n<p>The following internal trouble codes have been documented for the 2005 Jeep Liberty PCM:<\/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-p0602-control-module-programming-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0602<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Control module programming error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#0563C1\"><b><u>Full P0602 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-p0606-control-module-processor\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0606<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Module processor failure<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#0563C1\"><b><u>Full P0606 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-p0607-control-module-performance\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0607<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0607-control-module-performance\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Module performance fault<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0607-control-module-performance\/\" style=\"color:#0563C1\"><b><u>Full P0607 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-p0611-fuel-injector-control-module-performance\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0611<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0611-fuel-injector-control-module-performance\/\" 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-p0611-fuel-injector-control-module-performance\/\" style=\"color:#0563C1\"><b><u>Full P0611 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-p0686-ecmpcm-power-relay-control-circuit-low\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0686<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0686-ecmpcm-power-relay-control-circuit-low\/\" 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-p0686-ecmpcm-power-relay-control-circuit-low\/\" style=\"color:#0563C1\"><b><u>Full P0686 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-p0687-ecmpcm-power-relay-control-circuit-high\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0687<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0687-ecmpcm-power-relay-control-circuit-high\/\" 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-p0687-ecmpcm-power-relay-control-circuit-high\/\" style=\"color:#0563C1\"><b><u>Full P0687 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>Factory Service Bulletin #18-029-07 outlines a generic procedure for PCM replacement on this model, providing step\u2011by\u2011step guidance for technicians.<\/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>18-029-07<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">18-029-07 Generic Powertrain Control Module (PCM) Procedure<\/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 2005 Jeep Liberty<\/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 to avoid voltage spikes.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep all ground connections clean and tight.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use proper jump\u2011start techniques to protect electronic modules.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address any diagnostic codes promptly before they worsen.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Inspect connector seals regularly for corrosion or damage.<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>What causes a PCM failure in a 2005 Jeep Liberty?<\/h3>\n<p>Common causes include exposure to extreme heat, voltage spikes from the charging system, and internal component wear over time. Regular electrical system maintenance can help reduce risk.<\/p>\n<h3>Do I need special tools to replace the PCM on my 2005 Jeep Liberty?<\/h3>\n<p>Standard hand tools are sufficient for removal and installation. The main requirement is a scan tool to verify communication after the swap.<\/p>\n<h3>Will a refurbished PCM work as well as a new one in my 2005 Jeep Liberty?<\/h3>\n<p>A refurbished unit that has been tested and VIN\u2011programmed can perform comparably to a new module, provided it matches the vehicle\u2019s specifications.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When the PCM in your 2005 Jeep Liberty needs attention, you can choose a repair that restores the original part or opt for a refurbished replacement that meets factory standards. Both paths aim to return reliable engine and transmission control, with the refurbished option often offering a cost\u2011effective solution while still delivering proper performance.<\/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\/jeepcombo\/jeep-pcm-4plugblack-sqmanual-1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 2005 Jeep Liberty\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2005 Jeep Liberty from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2005-jeep-liberty-3-7l-engine-computer-pcm-ecm-ecu-programmed.html\"><b>refurbished, VIN-programmed PCM for the 2005 Jeep Liberty<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/jeep-ecu-ecm-pcm\/liberty-engine-computers.html\">Jeep Liberty module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<p>If your 2005 Jeep Liberty is experiencing powertrain glitches, evaluating the PCM\u2019s condition is a logical next step. Consider a certified replacement to ensure your vehicle runs smoothly, and feel free to reach out for further guidance.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>If your 2005 Jeep Liberty shows no\u2011start or shifting issues, a failing PCM could be the cause. Diagnose carefully to avoid costly repairs and restore performance.<\/p>\n","protected":false},"author":1,"featured_media":520454,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,34],"tags":[114,45,49],"class_list":["post-531551","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-jeep","tag-114","tag-jeep","tag-liberty"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2005 Jeep Liberty Powertrain Control Module 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\/2005-jeep-liberty-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2005 Jeep Liberty Powertrain Control Module Overview - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"If your 2005 Jeep Liberty shows no\u2011start or shifting issues, a failing PCM could be the cause. 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