O2 sensor replaced twice within last 4 months and engine light came on. The local shop told me to go to the Audi dealership for further diagnosic cause they don't have the advanced equipment. Perhaps catalytic converter bad???
My car has 73000 miles.
My car has an automatic transmission.
Hi there. If the check engine light is still on for the oxygen sensors, look at the description of the code to see if the sensor relates to a lean or rich condition. If the code does not, then there could be a broken wire on the harness to one or both sensors. If the code does have a lean or rich condition, then check the following:
These symptoms are more related to what can cause an oxygen sensor to record as the engine is running. If you need further assistance with your check engine light, then seek out a professional, such as one from Your Mechanic, to help you.