PCM DTC Chart

DTC	Description	Action
P164D	AWD ID Block Corrupted, Not Programmed	CLEAR the DTC. REPEAT the self-test. If DTC returns, enter the ID located on the RDU and program into the PCM.
P181F	Clutch Control System Performance	This an internal AWD relay module fault. INSTALL a new AWD relay module. REFER to All Wheel Drive (AWD) Relay Module .
P182B	Transfer Case Fluid Temperature Sensor Circuit Range/Performance	GO to Pinpoint Test B .
P182C	Transfer Case Fluid Temperature Sensor Circuit Low	GO to Pinpoint Test B .
P182D	Transfer Case Fluid Temperature Sensor Circuit High	GO to Pinpoint Test B .
P187B	Tire Size Out of Acceptable Range - AWD Disabled / Limited Function	GO to Pinpoint Test C .
P188B	AWD Clutch Control Circuit	GO to Pinpoint Test D .

P188C	AWD Relay Module Communication Circuit	NOTE: DTC P188C can be falsely set when performing output state control on the ATC by commanding the PID AWD_CLTCH_CMD# to 0% duty cycle. CLEAR the DTCs. REPEAT the self-test. If DTC returns, GO to Pinpoint Test E .
P188D	AWD Relay Module Feedback Circuit	CLEAR the DTCs. REPEAT the self-test. If DTC returns, GO to Pinpoint Test E .