Because P0700 is so general, it doesn't pinpoint the exact issue. Further diagnostic steps are required to find the root cause. The problem could be anything from a faulty sensor (like a speed sensor or shift solenoid) to a wiring harness problem, a failing transmission control module, or even low transmission fluid.
To diagnose the problem, you'll need:
* A professional-grade OBD-II scanner: A basic code reader might only show P0700. A more advanced scanner can access more specific trouble codes related to the transmission system, giving a clearer indication of the problem area.
* A qualified mechanic: Transmission problems can be complex and expensive to fix. A mechanic with experience working on Chrysler Town & Country transmissions will be able to properly diagnose the underlying issue and provide the most effective repair.
Simply clearing the code with a scanner won't fix the problem; it will only temporarily erase the warning light. The underlying fault needs to be addressed.
