anyone have a problem with the first bank of oxygen sensors after upgrading the exhuast and adding a catless y pipe with O2 simms for the second bank oxygen sensors? ive replaced both of the oxygen sensors and my car is still throwing a P1133 and P1153 code. Thanks, Adam

 

I've been chasing codes 1153 and 1133 since I installed my Jet-Hot LT Headers last March. Some cars just don't like LT's. I've changed O2's and checked for leaks, and everything else that's been recommended and I still can't solve the problem.

I'm taking my headers off. The problem has gotten so bad that my car has started missing until the SES light trips and goes into open loop mode.