I can't figure out why the check enging light didn't go out after I replaced the 02 sensor and that was the only code that came up for the light being on, So I changed the 02 sensor and after about 5 minutes of driving the light popped back on so I did the dianostic again and the same code came up so now I'm lost.
Check Engine Light on 2003 Pontiac Grand Am
by sts_rider in Philadelphia, PA on July 16, 2010
1 answer 1 comment
ANSWER by hemicuda on July 16, 2010
What brand of oxygen sensor? sometimes the aftermarket sensors won't quite send the right signal maybe try a stock sensor
COMMENT by sts_rider on July 16, 2010
It was a bosch brand o2 sensor, But I'll get a a/c delco sensor and see what happens.
Illumination of the Check Engine Light may be the result of a loose or worn gas cap.
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The oxygen sensor can fail causing Check Engine Light illumination and the engine to run rich (burn more fuel than normal).