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wbradford00 OP t1_iyco7br wrote

Reply to comment by alphaomega45 in Looking for auto mechanics who will do electrical work by wbradford00

2004 grand Cherokee shop can't figure out p0031 code (o2 sensor has been replaced)

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alphaomega45 t1_iyd8two wrote

If you already change the o2 sensor in question I would check the related fuse at that point. If the fuse checks good I would test the voltage coming out of the plug for the o2 sensor with a multimeter. Could be possible there is a bad ground in the line.

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wbradford00 OP t1_iydbvmo wrote

Fuse is good, albeit it is a 20a when it calls for a 10. I checked for continuity at the sensor harness, it checked out but I have yet to try voltage as I thought the o2 needed to be plugged in for the pcm to send the voltage through the wires.

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