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I haven't driven the car over a month so I had to jump start it a few times. Don't know if that has anything to do with it but now the tach reads 1,000 rpm too high, and with the engine off, it points to 1,000. Can the tach be adjusted with a scan tool?
Sometimes one needs to do that by holding the vehicles + and - battery terminals together whilst being disconnected from the battery approx 15-20 seconds.
Then you reconnect terminals to the battery.