Transmission Code

P1899 - P/N SWITCH STUCK IN PARK OR IN GEAR

When Monitored and Set Condition: P1899 - P/N SWITCH STUCK IN PARK OR IN GEAR
When Monitored: Continuously with the transmission in Park, Neutral, or Drive and NOT in Limp-in mode.
Set Condition: This code will set if the PCM detects an incorrect Park/Neutral switch state for a given mode of vehicle operation.

POSSIBLE CAUSES:
INTERMITTENT PARK/NEUTRAL SWITCH
P/N POSITION SWITCH SENSE CIRCUIT SHORTED TO GROUND
P/N POSITION SWITCH SENSE CIRCUIT OPEN
TRANSMISSION RANGE SENSOR
POWERTRAIN CONTROL MODULE