OBD-II code · Chassis
C009D 4WD/AWD Rear Differential Unit Actuator B Position Sensor A
Fault on rear differential actuator B position sensor A.
Is it safe to drive with C009D?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor failed
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Rear Diff Actuator B Pos A
Related codes
- C009A4WD/AWD Rear Differential Unit Actuator A Position Sensor B
- C009B4WD/AWD Rear Differential Unit Actuator A Position Sensor C
- C009E4WD/AWD Rear Differential Unit Actuator B Position Sensor B
- C009F4WD/AWD Rear Differential Unit Actuator B Position Sensor C
- C009C4WD/AWD Rear Differential Unit Actuator A Position Sensor Correlation
- C00A04WD/AWD Rear Differential Unit Actuator B Position Sensor Correlation
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.