A little less than a month ago my service engine light came on and I pulled the 04/11 code. Turned out to be a problem with the front oxygen sensor, which I had replaced. ECU was reset and I had no problems with the car until this week. I was coming home from a trip (over 500 miles) and my service engine light came on again. I pulled the codes and got 04/12 and 02/10. From what I've read so far, these two codes are related as 02/10 has to do with air/fuel mixture. I'm wondering if this is normal to happen around the 80k mark, or is it possible that my mechanic screwed something up when he replaced the other oxygen sensor.

Also, how hard would it be to replace this oxygen sensor?

-Graham

 

Can anyone help?

 

Well according to the code diagnosis 04-10 is nothing and 2-10 is Fuel Injection System Left Bank - Lean. So if you find out where that is, and fix it you should be all set.

 

I accidently typed 04-10 when I started this thread. It was supposed to be 04-12(oxygen sensor).

Do you know where the oxygen sensor for the 04-12 code is located?

 

Are both of these codes for the same oxygen sensor?

FRONT O2 SENSOR-B1 P0131 0411 EC-158
FRONT O2 SENSOR-B1 P0134 0412 EC-179

 

I'm looking over my invoice for the repair of the oxygen sensor and it says the following:

CODE P0154 O2 SENSOR
BANK 2 SENSOR 1 CIRCUIT
INACTICE

When I pulled the codes before taking the car in, the code was 4/11(P0131, not P0154). Are these related, or did my dumbass mechanic replace the wrong O2 sensor?