P1840 FORD – Transmission Transfer Case Shift Motor Short Circuit To Battery

P1840 FORD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1840 FORD Possible Causes

Faulty Transmission Transfer Case Shift Motor,Transmission Transfer Case Shift Motor harness is open or shorted,Transmission Transfer Case Shift Motor circuit poor electrical connection

P1840 FORD Description

The Transmission Control Module (TCM) monitors the Transmission Transfer Case Shift Motor. The ECM sets the OBDII code when the Transmission Transfer Case Shift Motor is not to factory specifications.