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How Do You Reprogram A PCM?

January 24, 2024 by David Martineau

How Do You Reprogram A PCM? To reprogram a PCM or other vehicle module, you need a factory scan tool, or an aftermarket scan tool with reprogramming capabilities, or a J-2534 compliant “PassThru” interface tool (or J-2534-1 for 2004 & newer vehicles) that can connect a PC or scan tool to the vehicle’s diagnostic connector

Does A New PCM Need To Be Programmed?

January 24, 2024 by David Evans

Does A New PCM Need To Be Programmed? Does a new PCM need to be programmed? If the PCM is faulty, it can disrupt the operation of various components hence why a reprogram is necessary. A PCM reprogram may change the engine’s idle speed, spark timing, and fuel mixture amongst other things. This brings the