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OBD-II Trouble Code P0688: ECM/PCM Power Relay Sense Circuit/Open
P0688 means there is an output circuit issue in the power relay sense circuit, likely due to a damaged or defective ECM relay or faulty wiring.

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2012 chrysler 200 won't start after replacing alternator which was bad after testing.
Hi there. It sounds like something may have shorted during the alternator replacement. If the positive cable going to the alternator made contact with anything metal, then it may have blown the main fuse. If not, then the battery should...

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