- Open the hood of the vehicle.
- Disconnect the negative battery cable from the battery. Use a wrench to loosen the lock nut, and pull the cable off. This cuts the power to the PCM. Wait for five minutes. Reconnect the negative battery cable to the battery and close the hood of the vehicle. The PCM is now reset.
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Correspondingly, how much does it cost to reprogram PCM?
Prices could range from $80 to $150, depending on the service location you choose. The process takes around about half an hour, but keep in mind that most auto-electricians charge you for at least one hour of work. PCM reprogramming is also one of the few times we'll recommend a dealership over an independent mechanic.
One may also ask, does disconnecting the battery reset the PCM? So, Disconnecting the car battery to reset the (PCM) on late model vehicles; can do more than just erase the keep alive memory. It can also erase vital learned information; that is absolutely necessary; for other modules to function normally.
Herein, how long does it take for PCM to reset?
It only takes ~30 seconds for the computer to relearn its settings. Generally it'll idle high during that time (at least on WJ's) until it learn them. So is there anything odd about what it's doing? Even when the old PCM was shorting out and resetting continually it didn't do this as far as I noticed.
What are the symptoms of a bad PCM?
These are the symptoms of a bad or failing engine control unit (ECU)
- Check Engine Light comes on. An illuminated Check Engine Light is one possible symptom of a problem with the ECU.
- Engine stalling or misfiring. Another symptom of a bad or failing ECU is erratic engine behavior.
- Engine performance issues.
- Car not starting.
Will a bad PCM throw a code?
Can you drive with a bad PCM?
