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To reset the PCM (Powertrain Control Module) on a 1999 Saturn L series, disconnect the negative battery cable and leave it disconnected for about 15 minutes to allow any residual power to drain. This helps clear any stored trouble codes and resets the PCM. After that, reconnect the battery cable, and the PCM will be reset. It's also helpful to drive the car for a short distance to allow the PCM to recalibrate itself.

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19h ago

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Where is the pcm on a 1999 s series Saturn?

To the right of the glove box.


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To reset the PCM (Powertrain Control Module) on a 1999 Saturn, disconnect the negative battery cable and leave it disconnected for about 15 minutes. This allows the PCM to clear any stored trouble codes and resets its adaptive memory. After that, reconnect the battery cable, and your PCM will be reset. It's also a good idea to drive the vehicle for a while to allow the PCM to relearn its parameters.


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What is a pcm on a 1999 s series Saturn?

PCM = Powertrain Control Module.It's a dedicated real-time computer system that controls just about everything to do with the operation of the vehicle. They are quite small, rugged and reliable. While a PCM CAN fail, the simple reality is, they seldom do.The PCM controls the timing and duration of the fuel injectors. It controls the spark advance and the EGR, transmission shift points and generally anything else that can affect the performance, emissions and economy.The PCM collects data regarding the operating status of the engine, including operating temperature, air temperature, air flow, throttle position, vehicle speed, amount of oxygen in the exhaust, wheel slippage and anything else that the engineers may have considered significant or just plain "nice".The PCM for a 1999 S series Saturn is behind the dashboard, just to the right of the glove box.


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