[vinmonty]

These codes won't go away. I have had them since February. I am getting horrible gas milage because of the codes. I am not hoping for AMAZING gas milage, I just want normal. I had my mechanic put the headers on when he did my timing belt and everything that goes along with it back in February and these codes have been throwing since. Any ideas? Any help? Think I should just replace the front o2's? I cleaned the MAF and I cleared the light and it popped back on 15 minutes later.

What is a normal o2 sensor reading?

 

[RacerXXL]

Go to the FSM and open section EC for your model year and run through the diagnostic for the codes.

 

[vinmonty]

Fsm?

 

[RacerXXL]

FSM=Factory Service Manual