Bought 2002 PT Cruiser for my son this past summer (Aug 2012). No problems with transmission until winter hit here in Texas last month (Dec 2012). The transmission goes into limp mode when the outside temperature dips down to the 30's. When the temperature is warmer (50's and up) it runs fine with no problems. Sometimes when running errands on a cold day it may come out of limp mode on a random basis. Also, when this happens the check engine light comes on with the P0700 code. Any advice on what to look at first (based on the fact that this outside temperature related) would be very helpful and appreciated.