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Re: Code P1391, P0320, Interference on 5 volt reference
Posted to Technical Discussion Forum on 2/13/2020

G'day Isaac, good suggestions testing for AC voltage/disconnect alt and drive belt.

Forget the scope just for a moment, use a DMM to measure the 5 volt reference, I have found that sometimes scopes are an excellent tool for showing problems that don't exist,... Login to read more.