C05DC4WD/AWD Clutch A Temperature Too High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- The calculated or measured temperature of clutch A has passed the protection limit, usually after long slipping in sand, snow or while towing. Audi stores C05DC00 in the AWD control unit of quattro ultra models: in TSB 2075681/1 the technician drives circles at full lock below 10 km/h for up to 15 minutes until the yellow four-wheel drive overheating lamp comes on, then erases the entry. Suppliers protect the clutch in steps. A BorgWarner patent cuts engine torque from 130 °C and stops at 110 °C; JTEKT estimates the oil temperature from transmitted torque and speed and lowers the target torque above a threshold; GKN's actuator controller also tracks clutch temperature. After cooling, AWD normally returns.
- What you may notice
- Yellow AWD overheating warning
- Less drive to the secondary axle until the clutch has cooled
- Engine power briefly reduced during wheel spin
- Likely causes
- LikelyLong periods of wheel slip in deep snow, sand or mud
- PossibleTowing or steep climbs with heavy load
- PossibleDifferent tyre sizes or wear front to rear force constant slip
- RareAged or wrong clutch fluid
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.