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Re: Both O2 sensors with negative voltage and?
Posted to Technical Discussion Forum on 8/17/2015 1 Reply

All,

I thought I should update you on this weirdness. Both O2 sensors were bad, as in producing negative voltage. BUT, the PCM was spiking them with voltage and both O2 sensors at the same time. It was also wacking out the MAP voltage which made it run pig ... Login to read more.

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