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Thanks for the feedback. I have a reader for my phone. I will see if I can read the O2 sensor with it. I will also try the Cat cleaner.

I have a 2007 JK that I added an AFE header and exhaust system to. After about 6 months of driving it with no issues I got a P013C O2 Sensor Slow Response rich to lean on Bank 2 Sensor 2. It seemed to reset itself for about 3 months as the check eng light would come on and off for various...