The day i had my hooker long tube headers and x pipe installed my knock sensor started setting off my SES light. I asked my mechanic why and he said there was a slim chance the back fire in the exhaust could be setting it off. has anyoe else had the problem. PLEASE HELP ME IF YOU CAN!

 

Are you positive that its your knock sensor? If you had true duals installed it's probably from the rear 02 sensors. It doesn't effect the way the car runs, just sets off the light. You can get the rear 02's deleted out or use 02 sims. Does the car run good?

 

I havent really got on the car all the way yet because i had the trasmission rebuilt at the same time. But i have an OBDII scanner at work and its saying knock sensor. I have reset it once and it came back on about 10 min later. But about the O2's, i have the sims on it.