Check Engine Light Due to Oxygen Sensor Failure on Chevrolet S10

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: 117,524 (49,000–185,432)
Exhaust & Emissions affected: 2.5L 4 Cylinder
7 model years affected: 1990, 1991, 1992, 1993, more2000, 2002, 2003
13 people reported this problem
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problem details
2003 Chevrolet S10 88,500 mi,
Check engine light on constantly. Level 1 diagnostic flagged Oxygen Sensor #1, Bank #1. Replacing sensor corrected problem.
1990 Chevrolet S10 141,500 mi,
truck start but runs high and low in idleing then stalls
Had to replace the down stream O2 sensor.
2002 Chevrolet S10 134,000 mi,
Sensor heater not working in 2 sensors
2003 Chevrolet S10 103,767 mi,
After changing the downstream sensor twice in 3 weeks it has failed again. Entire exhaust is new. What gives?