C05E94WD/AWD Clutch B Actuator Control Circuit Low
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- The voltage on the clutch B actuator line reads below the expected value, which points to a short to ground between AWD module and coil or motor, or to a driver stage that pulls the line down. A Mitsubishi Electric clutch patent shows how such a fault is caught: high-side and low-side transistors feed the coil, with the selector in P or N the module checks both terminal voltages against what they should read, and a deviation turns off both drivers, leaving the clutch released. Modern motor driver ICs such as TI's DRV8873-Q1 report a short to ground as a separate fault class. In a twin-clutch rear unit, B may serve only one rear wheel, so drive on that side is lost first. No manufacturer publishes a C05E9 case; C05EA is the opposite fault.
- What you may notice
- AWD warning, all-wheel drive disabled
- Fault returns at once after clearing, often after driving through water
- Likely causes
- LikelyChafed actuator wire shorting to ground near the rear axle
- PossibleWater or corrosion in the rear drive unit connector
- PossibleInternal short in the clutch B coil or motor
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.