OEM 2005 Buick LeSabre Engine Control Module

2005 Buick LeSabre Parts Questions & Experts Answers

• Q: What does the service of the engine control module (ECM) typically involve on 2005 Buick LeSabre?

  A: Pcms require replacement as a service method or the electrically erasable programmable read-only memory (EEPROM) needs programming. You need to establish the pcm is the right component before starting the replacement process. Unsuccessful service of the pcm requires removal of the faulty unit followed by installation of a newly purchased pcm. The device must undergo programming after setup because it will automatically lack pre-installed programming. A diagnosed dtc p0602 shows that eeprom lacks programming or functions improperly. Preventing electrostatic discharge damage requires you to keep away from the pins of connectors and the soldered components of the circuit board. A driver should shut off the ignition power before operating pcm connectors or handling power connections. A scan tool allows you to retrieve and save the engine oil life percentage so that the new module without programming does not reset oil life to 100 percent, which requires a 5,000 km (3,000 mi) maintenance interval following the last oil change. The maintenance procedure starts by disconnecting the negative Battery Cable and detaching the intake duct followed by removing the two screws from the upper and lower air cleaner assembly sections to extract the upper air cleaner housing assembly. Next dissociate the pcm connectors and extract the pcm and harness out from their housing before unconnecting those same connectors. To put in the pcm you first need to reconnect the pcm connectors with a torque of 8 n.m while afterward reinstall the pcm and harness into the housing before adding the upper air cleaner housing followed by tightening both screws to 4 n.m. After installation of the intake duct you should complete the process by reconnecting the negative Battery Cable. The new pcm needs programming after installation while it blocks secondary air pump operation until the vehicle reaches 10 miles of driving.