DTC P21AF Chevrolet

Cause and Solution

INTERMITTENT TRANSFER CASE RANGE POSITION SENSOR CIRCUIT LOW(K504) DRIVETRAIN 5-VOLT SUPPLY CIRCUIT OPEN(K504) DRIVETRAIN 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE(AUTO T-CASE) (T315) MOTOR CONTROL A CIRCUIT OPEN(AUTO T-CASE) (Z908) GROUND CIRCUIT OPEN(AUTO T-CASE) (T315) MOTOR CONTROL A CIRCUIT SHORTED TO GROUND(MANUAL T-CASE) (T314) TRANSFER CASE RANGE POSITION SIGNAL CIRCUIT SHORTED TO GROUNDTRANSFER CASE SHIFT MOTOR MODE SENSOR ASSEMBLYDRIVETRAIN CONTROL MODULE (DTCM)