I need to try and explain the P0700. It is a generic informative code which normally indicates an issue with one of the sensors. Yes, the TCM can be bad, shorted, or have an open circuit, but that is to be determined. It primarily indicates a problem with the transmission controls including sensors and actuators.
What is recommend at this point is to find someone with a scanner that can read specific transmission codes to further investigate the TCM. Chances are, the TCM code is coming on because of a faulty shift solenoid, but the only way to be sure is to actuate the solenoids / sensors via a scanner to see how they react.
Monday, November 9th, 2015 AT 5:35 PM