P1878 – Transmission Transfer Case Disengaged Solenoid Circuit Failure

P1878 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1878 Possible Causes

Faulty Transmission Transfer Case Disengaged Solenoid,Transmission Transfer Case Disengaged Solenoid harness is open or shorted,Transmission Transfer Case Disengaged Solenoid circuit poor electrical connection

P1878 Description

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