1994 Mustang Cobra, O2 sensor problems
1994 Mustang Cobra
I replaced my O2 sensors over the weekend because I had really low fuel economy and I heard that this had helped a few others. Well, now my check engine light is coming on. It comes and goes about 2-5 min intervals. I am sure its the O2 sensors. Do I need to reset the computer? Do they need break-in time? My car seems to be running normal, but I havent had them in long enough to see if the fuel economy had changed?
Should I take them back to Autozone ASAP?
Just to clarify, the check engine light neevr came on before changing the O2 sensors.