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06/12/2022 7:43 pm
Topic starter
I just got P0420/30 codes after replacing cat converters and O2 sensors on my 2008 Infiniti G35 Journey sedan.
Before replacement, NO codes were present. The cats are AP Exhaust direct fit units and O2 sensores Denso and NTK.
Someone suggested to give it a try using Cataclean and erasing the codes to see if they pop up again. I'm not sure if this will help because everything is new (except the headers, where carbon may reside or not).
Will Cataclean, at least, World not male the issue worse?
Any comment will be much appreciated.
1 Answer
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06/12/2022 9:43 pm
Did you replace the spark plugs (properly gapped) and do a reset? If, as you say, you had no codes before replacing the cats and 02 sensors, why did you replace them? Are the 02 sensors after market or OEM?
