Check Engine Light Due to Gas Cap Issue on Oldsmobile Alero

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

RepairPal Verified
Average mileage: 139,028 (108,000–175,000)
6 model years affected: 1999, 2000, 2001, 2002, more2003, 2004
19 people reported this problem
5 people shared problem details
2002 Oldsmobile Alero137,000
I had the check engine light come on. My husband took it to an auto shop and the manager asked him if we filled up with gas, which we did. The manager of the shop went out and twisted the gas cap and said that the light would go off soon. The check engine light did go I make sure that I twist the cap several times after filling up with gas. I have not had any problems since then. The best part is that this auto shop did not charge me a penny and knew what the problem was without hooking it up to machines. This auto shop now has all my business, for I know they will not take advantaged of me.
1999 Oldsmobile Alero122,000
my check engine light came on saying due to gas cap and it would go away every time i tightened it, but as it turned out this was actually the beginnings of my fuel pump going out and causing low gas pressure.
2000 Oldsmobile Alero151,200
service engine soon when I am down to about quarter tank of gas.
1999 Oldsmobile Alero108,000
loose gas cap, caused service engine soon lt to come on
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