If you pull the code, we can look up the specific DTC and possibly help you diagnose it. Fill out your profile so we know if you have QT-II, QD-II, etc for a 4WD system.
Also, please tell us what the dealer did in his service (from your service receipt).
I have the '08 FSM, but the DTC's are probably no different.
HEMI CLUB MEMBER #45; SILVER WK CLUB MEMBER #13
'08 WK GC Limited. 5.7L HEMI. Quadra-Trac II. Bright Silver Metallic. Class IV hitch.
Michelin LTX M/S tires. Fumoto oil drain valve. Billet Technology oil catch can.