golden1245
Active Member
- Joined
- Sep 6, 2011
- Messages
- 211
- Car
- 1999 C230K Sport
Just got a check engine light and BAS/ASR light come on this morning. I took it to a auto parts store to have the codes read and the only thing it threw back was a P0422.
Definition: Catalyst efficiency low-bank 1
-probably causes: Cats defective, engine misfire, large vacuum leak or engine oil leakage into exhaust valve guide seals/piston rings.
Engine is running smoothly, no misfires or loss of power yet...
I'm not sure if there's a vacuum leak...so it should mainly be the O2 sensors or the catalytic convertor right?
Let me know if you guys can shed any light on this. I'd like to research as much as I can before going to the mechanic. Thank you for reading
Definition: Catalyst efficiency low-bank 1
-probably causes: Cats defective, engine misfire, large vacuum leak or engine oil leakage into exhaust valve guide seals/piston rings.
Engine is running smoothly, no misfires or loss of power yet...
I'm not sure if there's a vacuum leak...so it should mainly be the O2 sensors or the catalytic convertor right?
Let me know if you guys can shed any light on this. I'd like to research as much as I can before going to the mechanic. Thank you for reading