Cool Grand Am Check Engine Light References. Whereas a steady check engine light may mean you merely need to tighten you gas cap next time you stop in order to reset the service. What might cause the check engine light to come on when you are driving at highway speed and then let off the gas?
If you decelerate (close the throttle) very slowly you can keep the light from coming on. The problem could be causing the abs and trac problems as well, or that could be a whole other issue. If you have a flashing check engine light, turn off the engine immediately to prevent potential motor damage.
