could i have a bad ecm? the trouble code i got when it was scanned was p0650 check engine light will not come on when switch is on


Asked by Nov 12, 2013 at 05:21 PM about the 2008 Saturn Aura XE

Question type: Maintenance & Repair

3 Answers


With the ignition on move the PCM harness at the PCM connector. Does the check engine light come on? If so, carefully inspect the wiring and connector that plugs into the PCM. If not, check the check engine light fuse. Is it blown? If so, instrument cluster is most likely shorted or wiring is shorted. HTH. -Jim


checked all fuses and all are good.checked all wires and connectors replaced instrument cluster still no check engine light. noticed that my information button does not work would that affect the check engine light?

1 out of 1 people think this is helpful.

It's very possible then that the PCM is bad. I doubt that the info button not working would cause this issue. I believe that would be controlled by the BCM (Body Control Module). When replacing the PCM on an OBD II vehicle, such as yours, it must be flashed using your vehicle identification number. This will program the new PCM to your specific vehicle. Otherwise it will NOT work. HTH. -Jim

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