The dreaded Check Engine Light came on today. I hooked up the trusty Durametrics fault code reader, and it showed 3 faults:

P1482 Heater final stage
tank leakage diagnosis module

P0447 Solenoid valve final stage
tank leak diagnosis module

P2400 Pump motor final stage
tank leak diagnosis module

Does anybody have any idea what these are about? I reset the errors, but they return when I start the engine. Yes, I tightened the gas cap. I have a 2007 Cayman S. The car runs fine, and there is no fuel leaking on the garage floor...