As above, it could be simply a bad connection somewhere like a wire shorting to ground or a cracked joint on a circuit board. I would clear the error code and see if it comes back almost immediately and go from there. Permanent faults are much easier to trace.
Hi I don't mean to hijack, can start a new thread, or pm, but cadman seems very knowledgable!
I have a subaru and the power windows are weird. on the driver control of the 4 windows, they seem to play musical chairs. One switch say driver window won't work (no attempt, ie no mechanical sound heard) for a few weeks, then it would work but the passenger window won't work, then it would migrate to the rear r passenger, now it's the passenger L window that has no connection.
Everytime i take it to the dealer he "resets" it and charges me labour/time. I'm not reseting anything anymore because it will just travel. a bit like a worm inside the car. It's an import so i'm not going to bother the local subaru HQ.