ButtonPuncher
Veteran CEG'er
On my MTX, I have a CEL (P0420 I think) saying catalyst inefficiency. The previous owner said that he had just replaced both of the sensors and that didn't fix it. Both of them do look brand new. It's not loosing antifreeze so the O2 sensors shouldn't be screwed up.
The car as 172k on it. Could the cat have worn out?
Thanks,
Ben
The car as 172k on it. Could the cat have worn out?
Thanks,
Ben