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I used Denso sensors could that be my problem? No misfires at all! I even tried that German made catalytic foam after the upstream sensors. But code returns usually within a drive or 2. But I am driving about 70 miles each way. I believe the car had a valve cover leak before i bought it. I noticed oil in the 4th spark plug hole and that coil was damaged. I replaced valve cover and gasket, Also, replaced all coils and plugs. It also had a leaking oil filter gasket. Not sure if either of these could have contributed to the clogging of the bank 2 cat?
I am not interested in a constant CEL though and don’t really wanna tune so I guess replacing with cats again may have to be my option. I just don’t want to cause any damage driving with a clogged cat. Thanks so much for your advice!
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