Originally Posted by Mlizen

I had the same problem, it was about 10 degrees F but my car had been in the heated garage all weekend. I locked it and unlocked it about ten times and still nothing. Then, in desperation, I locked it three times and heard a click in the door on the third lock and unlocked it and it opened no problem. This has happened a few more times to me also and this trick seems to always work for me.... Hope it helps!