C00A1Driveline Control Module
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- This umbrella code concerns the driveline control module itself, often called AWD or 4WD module, not one of its outputs or sensors. It covers internal faults such as memory or processor errors, a missing or poor supply and ground, or software and configuration problems that stop the module from controlling clutches, transfer case or disconnects. GKN describes such controllers as layered software, from operating system through actuator drivers up to vehicle functions; BorgWarner builds the electronics straight into the brushless actuator of its coupling. Ford gives a code-specific example: SSM 51659 covers 2023 F-Super Duty trucks built up to 9 May 2023 that store C00A1 in their AWD module or lose four-wheel drive, and asks to check that ground G239, under the right-hand front sill trim close to the BCM, is tightened to 8 Nm.
- What you may notice
- Four-wheel drive inoperative
- 4WD/AWD warning or service message
- Further driveline codes or lost communication with the module
- Likely causes
- LikelyLoose or corroded module ground (Ford G239 on 2023 Super Duty)
- PossibleLow battery voltage or poor supply to the module
- PossibleModule software or configuration fault, update or reprogramming needed
- RareInternal failure of the driveline control module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.