Rich-running engine due to oxygen sensor failure on Buick Skylark

Problem Description and Possible Solution

The oxygen (O2) sensor may fail causing the engine to burn to much fuel and may cause the check engine (SES) light to illuminate.

Problem Data
RepairPal Verified
Average mileage: (–)
Exhaust & Emissions affected: 2.3L 4 Cylinder
4 model years affected: 1992, 1993, 1994, 1995
4 people reported this problem
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