C00984WD/AWD Rear Differential Unit Actuator B Data
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Covers the data or feedback associated with rear differential actuator B (C0097), as opposed to a plain circuit fault. Where C0097 flags the drive circuit, this code is set when actuator B's reported data, its position, current or status feedback, is missing, out of range or implausible against the command, so the controller cannot confirm what the actuator is doing. AWD coupling patents describe closed-loop control that relies on actuator feedback to meter clutch engagement; losing that feedback degrades control even when the drive circuit is intact. A fault makes the affected rear function untrustworthy, so the controller may default to a safe state and set the AWD/4WD warning lamp; braking and ABS are unaffected. It is the data counterpart to actuator B (C0097) and parallels C0096 for actuator A.
- What you may notice
- AWD/4WD warning lamp on
- Rear function engagement unconfirmed
- Default safe AWD state
- Likely causes
- LikelyActuator feedback data missing or implausible
- PossibleCommunication fault with the rear module
- RareActuator not responding as reported
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €200 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.