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Re: GM O2 PCM Comparator Voltage drop??
Posted to Technical Theory Forum on 10/27/2000 1 Reply

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As far as I am aware the PCM subs 0.45v when sensor is cold or disconnected.

I'm not familiar with these vehicles but I would check all the loom from the RH O2S to the PCM very carefully first. Next... Login to read more.

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