Check engine light goes off and comes on and it seems to be related to when I put gas in the car. (Not always but too many times to be a coincident). Any ideas on how my putting gas in the car can affect the check engine light going on or off?
intermitten check engine lite on 1997 Isuzu Trooper
The engine light alert you about a fault in the emission control system, the gas cap not closed properly could cause the Check Engine Light to go off. To better troubleshoot the problem I would recommend you to retrieve the diagnostic codes stored on your vehicle's computer.