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

Submitted by Vehicle Owner · May 29, 2025
Published by RepairPal

Problem overview

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

10 people reported this problem
4 comments
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Pontiac Grand Am vehicles with this problem

Average mileage: 191,369 miles
(144,000 - 210,000)

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