OBD-II code · Powertrain (generic, extended)
P279D Four Wheel Drive (4WD) Range Signal Circuit
The 4WD range signal circuit (reporting whether 2H, 4H, 4L is engaged) returns no usable signal.
Is it safe to drive with P279D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen range sensor or broken signal wire
- PossibleCorroded sensor connector
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Four Wd Range Sensor, Transfer Case, Wiring Harness
Related codes
- P279ATransfer Case Gear High Incorrect Ratio
- P279BTransfer Case Gear Low Incorrect Ratio
- P279CTransfer Case Gear Neutral Incorrect Ratio
- P279EFour Wheel Drive (4WD) Range Signal Circuit Range/Performance
- P279FFour Wheel Drive (4WD) Range Signal Circuit Low
- P27A0Four Wheel Drive (4WD) Range Signal Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.