I've had an egine light on for about a month and half now. Catalytic deficiencey past threshhold. Now suddenlt light shut off a few days ago and hasnt come back on..wtf? The code was from the over kill 3" exhaust i installed. Any ideas why it shut off? and yes the light still works.

 

did you install a catless dp

 

high flow cat

 

Gremlins.

 

mogwai?

 

your car learned the exhaust. or relearned what ever you did. CEL went out becuase its seen the same parameter's for a drive cycle.

 

I was thinkin the same jus wasnt sure. thanx