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Re: P0641 VREF 1 low
Posted to Technical Theory Forum on 8/3/2018 1 Reply

Hi Geoff

How about this scenario,before the 5V ref [...] one sensor at a time on the said 5V reference line disconnect the sensor a code will set,look for the P0641 also. You might also check the pattern on the scope for each individual sensor disconnected,i... Login to read more.

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