My 2005 PT Cruiser (not turbo) is giving me a very frustrating P0700 code and a weird problem. First thing in the cold, autumn, New York morning, the car drives perfectly fine (through still with the engine code on). Once the day warms up a little, the transmission decides that shifting past second gear is for punks and won’t do it, so 30 mph has the engine revving at 3K rpm. My morning commute is 20 minutes, and in that time, I go up to 50 mph with no issues. Driving home, or any other time of day, becomes the issue.
What in the world could possibly be going wrong? I’ve been trying to hit up the junkyard for a PCM to see if switching that out would help, but it’s been too rainy and cold to get out there. Any other thoughts/suggestions?