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wbradford00 OP t1_iyb1k03 wrote

Reply to comment by Practical_Argument50 in Looking for auto mechanics who will do electrical work by wbradford00

Yeah, this is starting to scare me a little bit. I think at worst case my PCM is bad, but I just need someone to narrow it down. I want to get a new car, but also want to wait a little while for prices to keep falling.

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alphaomega45 t1_iyblcfr wrote

What is the model and year of the jeep? What is the electrical problem it is presenting?

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wbradford00 OP t1_iyco7br wrote

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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