OK...before I get a "did you search the forums" response, I did. I'm just looking for a little advise and expertise that I do not have.
When I bought my 06 Trailblazer, the CEC light was on durring the test drive. The dealer told me it was an O2 sensor and they were going to replace it. The fuel guage did not work, so they replaced the sending unit. Wehn I picked it up from the dealer, the CEC light was off and the fuel guage worked fine. The CEC light came on two days later. I had it checked at Autozone (can't remember that particular code), consulted the collective brain of Trailvoy and determined it was a dirty throttle body. I had the dealer clean the throttle body and the CEC light stopped. A couple days later I get code p0171. At this point the light would come on and go off about every two days or so.
I changed the O2 sensor at the engine last night, since that seemed to be the first option suggested by most of you. I diconnected the battery and all was good. My wife started it this morning and she said it sputtered for a few seconds after startup which it has never done before. After about a mile or two of driving the CEC light came back on with the p0171 code again.
Any suggestions on what I should do next, realizing that I am not a skilled mechanic, but can do minor repairs. Should I try to clean/replace the MAF sensor? Could it be the O2 after the CAT? Any help would be great. If I have to take it in to a shop I will, but I'd like to do what I can first.
Thanks!!
When I bought my 06 Trailblazer, the CEC light was on durring the test drive. The dealer told me it was an O2 sensor and they were going to replace it. The fuel guage did not work, so they replaced the sending unit. Wehn I picked it up from the dealer, the CEC light was off and the fuel guage worked fine. The CEC light came on two days later. I had it checked at Autozone (can't remember that particular code), consulted the collective brain of Trailvoy and determined it was a dirty throttle body. I had the dealer clean the throttle body and the CEC light stopped. A couple days later I get code p0171. At this point the light would come on and go off about every two days or so.
I changed the O2 sensor at the engine last night, since that seemed to be the first option suggested by most of you. I diconnected the battery and all was good. My wife started it this morning and she said it sputtered for a few seconds after startup which it has never done before. After about a mile or two of driving the CEC light came back on with the p0171 code again.
Any suggestions on what I should do next, realizing that I am not a skilled mechanic, but can do minor repairs. Should I try to clean/replace the MAF sensor? Could it be the O2 after the CAT? Any help would be great. If I have to take it in to a shop I will, but I'd like to do what I can first.
Thanks!!