Daughter called from Reno today. It's cold there, like 0 degrees last night. She drives a 2012 T4R with about 5k miles on it. Last night, got in, shifted into 4wd and went to back DOWN the driveway. Vehicle wouldn't roll down the driveway. Resistance. Gave it some throttle ("that seemed odd"), backed down and drove about ten miles, returned home then parked. This morning started up, but can't get into 2wd. Check engine light is on, and traction control light says TC is off. Can drive in 4wd but with much resistance, need throttle to advance, and lurch and lunge around corners. This is a new Forerunner. Is this really a stuck in 4WD issue? Is the solution to just drive it despite the strong resistance, warm it up and try to force it back to 2WD? I've had several T4R's and never the slightest issue. Love to hear a solution. Thanks.