What functions/system errors will cause the Check Engine light to come on? Initially, the light would go off and on at different times. Now it's on all the time. However, I know from the past that functions as insignificant seeming as not having the gas cap on tightly caused the light to come on. So, what other things such as that will cause the light to come on that don't have anything to do with the true function of the engine? Years ago, when the Check Engine light came on, one would stop the car immediately and not drive it until the problem was resolved. Now, I don't trust that light if it could be something as simple as not having the gas cap on tightly. Thanks for your input.
Mar 28, 2010 at 9:46 PM