P0921 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0921 – Gear Shift Forward Actuator Circuit Range/Performance

 

P0921 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P0921 Possible Causes

 

Faulty Gear Shift Forward Actuator,Gear Shift Forward Actuator harness is open or shorted,Gear Shift Forward Actuator circuit poor electrical connection

 

P0921 Description

 

The Transmission Control Module (TCM) monitors the Gear Shift Forward Actuator. The TCM sets the OBDII code when the Gear Shift Forward Actuator is not to factory specifications.