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08/12/2021 11:24 pm
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I have an 02 maxima that often throws a P0420 code. Currently no code but I noticed that 2 of the emissions test state"not passed" using "Car Scanner" app. I have put quite a few miles on it since clearing the code. Catalyst and Oxygen sensor are the 2 tests. Thoughts on root cause? Or next steps to diagnose?
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