This happens to me to. I just always assumed it was the front differential fluid. I thought it had something to do with it getting thicker at cold Temps and throwing off the sensor. mine will go away pretty quickly. It's been doing it only on very cold nights since I got it.
2006 Jeep Commander, 5.7 Hemi, OME 2" HD Lift,Robby spacers,New and improved Jeepin by AL UCA,265/70/17 Fierce Attitude on XD Spy 17x8 with +18 offset,Magnaflow Cat Back,4xGaurd Matrix w/hoop,Mopar Chrome side steps, Chrome door handles,Chrome Fuel door,Chrome Jeep bug deflector,AVS window vents,Home made roof lightbar, 2009 Mygig with lockpick,Backup camera.