2012 Dodge 3500 with intermittent dead pedal.

Starts and drives but then get a dead pedal response.

Changed the accelerator pedal sensor and it still can happen.

If you unplug the pedal it will "reset". No codes are thrown on the dash.

I took it to the dealer and they said they need a block of time to look at it.

Initial diagnosis showed "TCM U1400 implausible TPS signal received active".

They show things are communicating but can't find the problem.

Maybe a short in the wiring.

Anybody?