P0421
Warm Up Catalyst Efficiency Below Threshold (Bank 1)
So I threw a P0421 code on my cp-e catted downpipe...this is actually the 3rd time it has happened now....past few weeks I have been throwing it and I just erase the code with my Equus DTC reader...but it keeps coming back after a few hundred miles
What do you guys think it is? According to the internet, it might be the catalytic converter or the o2 sensor itself
For those who have Cp-e catted downpipe, what would you suggest?
Warm Up Catalyst Efficiency Below Threshold (Bank 1)
So I threw a P0421 code on my cp-e catted downpipe...this is actually the 3rd time it has happened now....past few weeks I have been throwing it and I just erase the code with my Equus DTC reader...but it keeps coming back after a few hundred miles
What do you guys think it is? According to the internet, it might be the catalytic converter or the o2 sensor itself
For those who have Cp-e catted downpipe, what would you suggest?
