Check Engine Light Due to Oxygen Sensor Failure on Pontiac Grand Prix

Problem Description and Possible Solution

The oxygen sensor can fail causing Check Engine Light illumination and the engine to run rich (burn more fuel than normal).

Problem Data
RepairPal Verified
Average mileage: 134,833 (80,000–200,000)
Exhaust & Emissions affected: 2.3L 4 Cylinder
6 model years affected: 1990, 1991, 1992, 2004, more2005, 2006
14 people reported this problem
Viewing 1 - 4 of 4 comments
02 sensor replaced and check engine light still on
Check Engine Light Due to Oxygen Sensor Failure - my light came on and now my auto start will not work.
Bought a car for grandsons graduation and it will not pass state emission test. Could it just be the oxygen sensor?? Gas mileage is fine and it runs good
O2 sensor was replaced, 1 and a half years later getting replaced again