Clear the error and try the switch again. Sounds like the switch may have got wet.

 

Like Steve said, or let it dry out a few days, maybe hit the switch area with a blow dryer if it is in fact that the gas lid release button got wet when the window was down, or you have a shorted release solenoid in the boot, if you can not get it open electrically and you need to fill up, you can pull the release cable in the boot.

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