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P031 and P037 Codes

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Old 22 Apr 2014, 10:15 pm
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Default P031 and P037 Codes

As I understand it, these codes are related to the O2 sensors, which makes sense, because the car is running very poorly and almost dies, so I assume the fuel mix is getting messed up.

So, a couple of questions for y'all:

1) I NEVER had these codes before replacing the PCM last fall. Immediately after replacing I got these codes, but was able to clear them. But, now they keep coming back. So....should I just replace the PCM again and save myself the hassle of trying to solve a "new" problem?

2) Is there an easy test to check if the sensors are actually bad so I can feel better about sending back the PCM for a replacement?

Thanks for your help!
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