I swapped out the engine harness and get P0700 Trans control sys and P0731 Gear 1 ration incorrect. Cleaned reseated connecters a lot. Reinstalled old harness after cleaning and inspecting, still getting the same codes and in limp mode. I wanted a harness in better condition than what I had is the reason for the swap. The only other issue jeep has is idle can act jump and be erractic for a few moments. Any ideas? thanks in advance.
