When do you need a powertrain control module?
When do you need a powertrain control module? Powertrain control modules (PCM) are used in vehicles compliant with the second generation of On-Board Diagnostics. This means the vehicle has to have been manufactured after 1996, and any troubleshooting must be done with a diagnostic hardware. The PCM is your vehicle's central computer, and it is part of the the OBD-II system. Which is a symptom of a bad Powertrain Control Module? The third symptom of a powertrain control module having issues is that the vehicle may not turn on or run properly. A bad PCM can cause the vehicle to...