C00A84WD/AWD Transfer Case Unit Actuator Position Sensor B
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- C00A8 is the second position signal of the transfer case actuator. Whether B is a redundant copy of A or tracks a different part, the motor or the cam, is not published by any maker; BorgWarner, for example, puts a contact probe on the shift drum cam instead of the motor because a torsion spring sits in between, and reads five plateaus from 2WD high to 4WD low. Stellantis lists C00A8-13, circuit open, in TSB 08-237-23 and in 08-122-24, which replaced 08-239-23 for 2023 Wagoneer and Grand Wagoneer built 16 to 24 June 2023: the MIL must be on, and a loose shift motor connector is the cause, verified by pushing, pulling and pushing the plug again. Ford SSM 52152 names C00A8:11 and :13 on 2020–2023 Explorer/Aviator. Magna's Hall sensor patent shows a sensor that can be exchanged from outside.
- What you may notice
- MIL illuminated (Stellantis), wrench indicator (Ford)
- 4WD Service light, four-wheel drive not available
- Likely causes
- LikelyShift motor connector not latched (Stellantis 2023)
- PossibleHarness damage at the heat shield near the transfer case (Ford)
- RarePosition sensor B defective
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.