When the check engine light came on couple of months ago we had a local mechanic diagnosed it. He said it was from not tightening the gas cap enough and charged us $150 to reset it.
Today the check engine light came on again and certainly I don't need the mechanic charge me another $150 and have the light come on again two months later. Ok, I'll get a new gas cap. Other than that, any ideas or suggestions. TIA