Check Engine Light Due to Oxygen Sensor Failure on Oldsmobile Cutlass Supreme

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

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Average mileage: (–)
Exhaust & Emissions affected: 2.3L 4 Cylinder
3 model years affected: 1990, 1991, 1992
4 people reported this problem
0 people shared problem details
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i changed the spark plugs and the light is still on and flashing

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