Now, i have put a turbo on my p5 and taken off the cat but the rest of the exhaust is still stockish. the p0421 code reads as this:
P0421: Warm Up Catalyst Efficency Below Threshold Bank 1
My question: is this code caused by the cat not being present before the o2 sensor?
Would getting a high flow cat get rid of the CEL that has bugged me for the last 20k miles?
If i dont get a high flow cat, how would i get rid of the CEL short of putting electrical tape over the light?
P0421: Warm Up Catalyst Efficency Below Threshold Bank 1
My question: is this code caused by the cat not being present before the o2 sensor?
Would getting a high flow cat get rid of the CEL that has bugged me for the last 20k miles?
If i dont get a high flow cat, how would i get rid of the CEL short of putting electrical tape over the light?