P279E
Four Wheel Drive (4WD) Range Signal Circuit Range/Performance
The 4WD range signal does not match expected value for the commanded transfer case position. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Range sensor signal driftPossible
- Shift motor did not fully complete the range changePossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Four Wd Range Sensor
- Transfer Case
P279E is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.