C05E74WD/AWD Clutch B Actuator Control Circuit/Open
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- The AWD module finds no usable current path in its driver output for the clutch B actuator, most often an open coil, motor winding, connector or wire. A second clutch exists either in a twin-clutch rear drive unit with one clutch per rear wheel, or as a disconnect stage in the rear axle. Ford is the only maker with a public case: SSM 51117 lists C05E7:19 for 2021–2022 Bronco Sport 2.0L, the engine sold with the twin-clutch Badlands rear drive unit, while the single-clutch models in the same bulletin only log C0095. Ford traces it to a magnet ring that sits out of position inside the rear drive unit motor; the motor is now replaced on its own. Ford does not state which rear wheel belongs to B. Driver chips such as TI's DRV8873-Q1 test for an open load before switching on.
- What you may notice
- AWD warning lamp or message, rear axle no longer driven
- Rear locking or torque vectoring function unavailable on twin-clutch units
- Fault is present again immediately after clearing
- Likely causes
- LikelyOpen coil or motor winding in the clutch B actuator
- PossibleMisaligned magnet ring in the rear drive unit motor (Ford Bronco Sport 2.0L)
- PossibleBroken wire or corroded connector between AWD module and rear drive unit
- RareFaulty driver stage in the AWD module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.