P279D Code: Meaning, Causes, and Symptoms | OBD2 Codes
P279D – Four Wheel Drive Range Signal Circuit
P279D Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P279D Possible Causes
Faulty Four Wheel Drive Range,Four Wheel Drive Range harness is open or shorted,Four Wheel Drive Range circuit poor electrical connection
P279D Description
The Transmission Control Module (TCM) monitors the Four Wheel Drive Range Signal Circuit signal. the TCM sets the OBDII code when the Four Wheel Drive Range Signal Circuit signal is out of the factory specifications.