I have Honda civic Lx 1998 and yesterday the engine check light was on while driving. Got it checked and it i was told that it is P0420 code which suggests malfunction of Cat convertor or O2 sensors. As I read online that cat converter replacement is expensive i dont wanna go for that...
Check Engine Light: What to check first, repair options 19-049 21-2381 1. Clearing the code and checking if it comes back: 2. Comparing the signals from the pre-cat air/fuel ratio (Front O2) sensor to the post-cat rear O2 sensor. ...