I just had a clutch put in and all of a sudden my check engine light is on. The code read was because of the second O2 sensor. I have a ultimate racings test pipe on my car, but before I had my clutch put in, no CEL for atleast 800-900 miles. I think when the clutch put in they might have disconnected the harness or something. Don't most cars have a wire clip you plug in or something? I remember my honda did....Any help would be appreciated. I cant find this harness clip anywhere to see if they disconnected it or not. Thanks.

 

why don't you reset the code 1st and see if it comes back on immedieatly. I doubt the clip came off. its located next to the gear shifter, inside the car.

 

I did that like three times and it always comes back on. The ultimate racing test pipe is supposed to not give a CEL, and it didn't until I had the clutch put in. I can't imagine why it is now....

 

Bump

 

what code is it? R U sure its the secondary o2 sensor??

 

if you are looking for the rear 02 sensor harness connection it is under the passanger seat on the left side under that carpet but their is a slit in it so you can reach under the carpet and pull the plug out. I hope this helps, atleast you can check and rule it out.