What it means
The control module monitors the 4WD/AWD range actuator’s position and movement. It sets this code when the actuator fails to move as commanded or remains stuck.
At a glance
- Usually lights the ABS or stability-control warning light
- The engine or gearbox may go into limp mode
How it works
The 4WD/AWD range actuator moves the transfer case between high and low range, while the control module checks whether the actuator moves to the commanded position. This code sets when movement does not occur as expected or the range mechanism remains stuck.
Common causes
Most likely first.
- Actuator mechanically jammed
- Damaged or worn actuator gears
- Transfer case or range mechanism binding
- Wiring or connector fault
Symptoms
- Unable to shift between high and low range
- 4WD/AWD warning light on
How to diagnose it
- Check freeze-frame data and related 4WD/AWD codes to identify the commanded range and whether position feedback changed during the failed shift.
- Confirm the vehicle was stopped and the shift was requested under the conditions specified in its owner's information, then check whether the range indicator matches the actual state.
- Inspect the actuator connector, harness, mounting, and transfer-case area for damage, loose connections, or visible obstructions.
- Use scan-tool data to compare commanded and reported actuator position during a permitted range command.
- If the electrical connections are sound but position does not change, test actuator movement and the transfer-case range mechanism using the manufacturer's procedure.
Common fixes
- Repair a damaged connector or wiring fault preventing the actuator from moving.
- Correct a visible obstruction or binding in the range mechanism.
- Replace a confirmed worn or damaged actuator gear assembly or actuator.
- Repair or replace a transfer-case range mechanism that is confirmed to be stuck.
Can I keep driving?
Do not force repeated high-to-low shifts; the vehicle may remain in its current range and the mechanism could be damaged further. Avoid routes that require low range, and drive cautiously if the current range is suitable.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.