3 weeks ago I had a servo motor error code also. After restarting the sled it ran fine the rest of the day. The next ride out I made it about 50 ffet from the truck. Sled died, lost tach, lights, hand warmers, basicly everything. After hours in the garage looking at wires I found it. Under the oil tank, wires had rubed through, grounded and fried my voltage regulator. Fixed wires, replaced voltage regulator. Went out yesterday, about 2.5 feet of fresh untracked powder. made it about a mile from the truck and got the servo motor error code. limped it back to the truck 50 feet at a time. Thats about as far as it would go before going into limp mode again. So, Now I am thinking that when those wires grounded it also fried my servo motor. Anyway, My point to all of this is CHECK YOUR WIRES !!!! I had actully looked at the wires under my oil tank twice before I actully saw the wires. Look again, make sure, the guys at cutlers say that is a comon problem with the 900 cat. the wires under the oil tank.