Check engine light came on. Is running a little rough....could it be bad gas? on 1998 Oldsmobile Aurora

Codes P0171, 0174, 0300 came up. How do I find out what they mean? Gas cap has been checked and is good.

by in Twentynine Palms, CA on February 06, 2013
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , February 07, 2013
ck for vac leak and then misfires.vac leak may be causing misfires