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International Automotive Technicians Network
Re: P0642
Posted to Technical Discussion Forum on 10/8/2022

*Always ck charging system prior to the below and DON'T forget to ck for AC voltage at the battery with car running and a light load - use an AC voltmeter - max ac ripple "might" be 75mV - (you can ck this specs) - computers HATE AC...

1st - ck the computer ... Login to read more.