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

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

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
11 people reported this problem
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
Viewing 1 - 3 of 3 problem details
2004 Pontiac Grand Prix 179,000 mi,
02 sensor replaced and check engine light still on
2006 Pontiac Grand Prix 80,000 mi,
Check Engine Light Due to Oxygen Sensor Failure - my light came on and now my auto start will not work.
2005 Pontiac Grand Prix 126,000 mi,
O2 sensor was replaced, 1 and a half years later getting replaced again