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Re: P0641 VREF 1 low
Posted to Technical Theory Forum on 8/2/2018 4 Replies

I am thinking maybe the code sets thru the particular sensor that can be grounded. Instead of the 5 volt reference circuits 1 or 2. if that makes any sense.

I agree you would think it would set a P0651 after swapping the terminals at the pcm.

Have you trie... Login to read more.

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