PCM Reprogramming is also necessary to change the engine idle speed, spark timing, fuel mixture or other emission control functions. The original factory programing may be overly sensitive or not take into account wear or other factors that may affect the operation of certain sensors or the OBD II monitors.ĬLICK HERE for a list of General Motors modules that are reprogrammable on 1993 to 2008 model year vehicles (pdf file). One is when a vehicle sets false trouble codes. Reprogramming may be required for a variety of reasons. Most domestic vehicles built since 1996 (over 150 million!) have computers that can be reprogrammed (for a listing of vehicles that can be flash reprogrammed, Click Here). MOST LATE MODEL VEHICLES CAN BE FLASH REPROGRAMMED For a complete listing of these websites and fees, Click Here. The flash reprogramming procedures must conform to SAE J-2534-1 standards, which allow the use of aftermarket scan tools or similar pass-through devices in addition to the factory scan tool.ĮPA rules require auto makers to post all of their text-based service and training information on the internet so anyone can access it, and at reasonable cost. Environmental Protection Agency regulations require original equipment manufacturers to make emissions-related onboard diagnostic service information available to the aftermarket via their technical websites, including updates on reprogramming vehicle modules.
REPROGRAMMED ECM SOFTWARE
This procedure is usually done at a new car dealership, but with the right software and tools independent repair shops or even individuals can reprogram their PCM Powertrain Control Modules (PCMs) and other onboard electronics.īasic steps of flash reprogramming a vehicle computer. Reprogram PCM by Larry Carley copyright 2021 Ĭar companies are relying more and more on flash reprogramming to correct driveability and emissions related problems in newer vehicles.
REPROGRAMMED ECM MANUALS
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