The Oxygen sensor is one of those things I think they teach you in the two-week Mechanic Course at ITT tech. If you don’t know what you’re doing and don’t know what the problem is, just replace the O2 sensor. It’s like air-conditioning repairmen blaming the “freon hose” when the filter just needs to be changed.
Every car I’ve owned has had this problem, and I recently had the repair done a few months ago… which didn’t fix a god-damned thing. We took our car in for emissions, and they detected that the 6th cylinder was misfiring within 5 seconds.
So now I have to have a little talk with Goodyear on how they can justify a $500 repair that didn’t do anything.