Fault code P0243

[Gin Man]

My 2005 Continental GT keeps throwing up code P0243. It only comes on when the car has been stationary when hot or when hot in slow traffic, I have checked as far as I can see for broken wires etc,I ran it with no under tray fitted and it didn't throw up the code, on refitting the under tray and getting up to temp the code came on when parked again.I don't want to start removing sensors randomly as they don't look very easy to get to, has anybody got any ideas as to the cause?

[WightGT]

Google it - there is plenty of advice there. Something to do with engine management and the wastegate solenoid.
Good luck!
David.

[goddo]

P0243 is a fault with the turbocharger waste gate solenoid.