[Opera House]

You probably got an evaporative leak code. When the gas cap fails to fix it the next probable thing is the vent solenoid for the charcoal canisters. This solenoid is located above the spare tire and is about $36 from dealer. It is in a location that gets water spray that can cause it to rust and bind open. The low tech method is if it looks bad, it probably is. Valve is normally open with power removed so you would have to apply power to see if it closes.