Engine light on and inspection time. The only code I can get is the 212 Oxygen sensor wiring/connection etc. It will not stay reset for more than a few miles. I looked under at the newish system (car new to me for 18 months) and I find two bungs upstream from the cat but both have bolts in them. I am not opposed to putting in an O2 sensor but I do not know where to find the wiring for it. When I bought the car, it had no light. it came on some time after buying so no changes to car mechanically.