C00924WD/AWD Power Transfer Unit Position Sensor B
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers position sensor B of the power transfer unit actuator, the redundant or second-channel position feedback the controller cross-checks against sensor A (C0091). Dual position sensors let the controller detect a single faulty channel and keep metering the AWD coupling safely. This code is set when sensor B is out of range, open, shorted or does not track sensor A within tolerance. AWD coupling patents describe closed-loop control of the clutch actuator using position feedback, where losing a channel degrades control. A fault makes the position feedback untrustworthy, so the controller may default to a safe torque split or two-wheel drive and set the AWD/4WD warning lamp; braking and ABS are unaffected. The entry follows the SAE J2012 generic definition and dual-channel actuator position sensing.
- What you may notice
- AWD/4WD warning lamp on
- Default torque split or 2WD mode
- Inconsistent AWD engagement
- Likely causes
- LikelyPosition sensor B failed or out of range
- PossibleSensor A/B signals do not correlate
- RareHarness or connector fault
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €1,600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.