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Hello, having an odd issue with my 2006 z06. After I plug something into the obd2 port, whether it be my HP tuner, a obd2 scanner or even a simple obd2 extension cord while the vehicle is running, shortly after it will throw the "service active handling" error.
I feel like it may be a ground issues therefore would like to clean / inspect the grounds of the #4 and #5 pin. #4 being the chassis ground and #5 being the ecm ground.
Any help locating these ground points or any other suggestions to correct this issue would be greatly appreciated.
Obd2 port issues
