Hey folks, first post. I'm having an issue, and have been having it basically for 2 years. I'm getting the p0420 and p0430 codes after replacing the cats, upstream O2 sensors, plugs, wires, and coil packs, the coolant temp sensor, battery, crankshaft position sensor, MAF sensor, evap canister, and the sensor that goes along the fuel filler neck. Also have changed the oil pressure switch.
For the life of me, I can't get these codes to go away. My next step is to check for any exhaust leaks. Has anybody had these issues before?
For the life of me, I can't get these codes to go away. My next step is to check for any exhaust leaks. Has anybody had these issues before?