C14A7
All-wheel-drive power transfer unit actuator blocked or not moving (FCA)
Severity: Severity not verifiedDrivetrain, 4WD and AWD codes
Four-wheel-drive and all-wheel-drive systems send engine power to both axles through a transfer case, a power transfer unit or an electronically controlled coupling. A control module decides how much torque goes to each axle and switches between modes. A fault usually turns on a 4WD or AWD warning and leaves the vehicle in two-wheel drive.
How these codes differ
- Most drivetrain codes are manufacturer-specific, so the same number means different things on different makes and the carmaker's definition is the only reliable meaning.
- Electrical codes (mode switch, shift motor, coupling solenoid, position sensor) point to the control circuit. Driving on with a blinking 4WD warning can damage the system, so it is worth having checked promptly.
- Wheel speed signals usually come from the ABS sensors, so an ABS wheel speed fault can also disable 4WD or AWD control.
Drivetrain, 4WD and AWD codes
C161E
Mitsubishi active center differential pump or relay fault
Severity: Severity not verifiedC140F
Final drive control module fault that disables 4WD shifting (Jeep)
Severity: MonitorC1477
Transfer case clutch over temperature (Jeep)
Severity: Severity not verifiedC1494
Power transfer unit fork position fault stored by the Jeep 4WD/AWD controller
Severity: Severity not verifiedC0631
Front axle disconnect actuator fault (Ford AWD)
Severity: Severity not verifiedC00A6
AWD module actuator fault, front axle disconnect or transfer case actuator (Ford and Lincoln)
Severity: Severity not verified
Sources and review
- 2003 Acura MDX Owner's Manual: Instruments and Controls, indicator lights
- Diagnostic Trouble Codes Explained: How to Manage DTCs
- Check and change ABS and wheel speed sensors
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error