So the fucking “check engine” light came on again three days after I picked it up from the mechanic for, like, the fourth time on June 28. I was ready to just give up. It drives fine.
Except that every two years, cars must be inspected for smog.
Well, mine FAILED smog inspection just a few minutes ago. Why? Because the system is running too lean and the 02 sensor is on.
I am furious. This is a three-month ongoing problem. When I picked the car up last time after he’d had it for an entire week, he had only replaced the sensor — again. He said, “A brand new oxygen sensor failed twice in a row! What are the odds?!” I bit my tongue. The odds are pretty high — in fact, the odds are pretty high that both upstream and downstream sensors actually were blown and needed replacing in the first place!
I recommend you never ever take your car to the AAMCO at 2345 El Camino Real, Santa Clara, also dba as C.F.R. Auto Inc. The owner’s name is Ben Wright. I think he’s a sweet guy, very personable. However, he didn’t fix my car, and that’s what matters in the end.

kathryn,
please feel free to email my husband doug (who sells cars) about this & tell him i sent you. i bet he will have some good ideas for you. doug@silveiraautos.com. work phone 415.599.3236. i am just appalled you are experiencing this.
kcd
Thank you, Kathleen. I may follow up on that. Husband first wants to take it to another mechanice that has done work for us before on another vehicle. We only went to the AAMCO place because it was really really close, and this other guy is in Mountain View. What a mistake! š