Chassis, generic

C05EB 4WD/AWD Clutch B Temperature Too High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The AWD module has calculated or measured that clutch B has passed its permitted temperature, usually after long slipping in deep snow, sand or mud, or when towing. In a twin-clutch rear module the two wheel clutches heat up separately, so one side can reach its limit while the other is still cool, for instance when only one rear wheel spins. GKN's actuator controller tracks clutch temperature, and suppliers patent staged protection: BorgWarner reduces engine torque from about 130 °C until the clutch drops below 110 °C, JTEKT estimates oil temperature from torque and wheel speed and then lowers the target torque. Audi documents the twin code C05DC00 for clutch A only. Once cooled, the system normally returns to full function. No manufacturer publishes a C05EB case.

Likely causes

Long wheel spin on one rear wheel in snow, sand or mud
Towing or climbing with high, continuous torque transfer
Different tyre sizes or wear front to rear causing permanent slip
Aged or wrong fluid in the rear drive unit

Symptoms

  • AWD overheating or temporarily disabled message
  • Less drive to the rear until the clutch has cooled
  • Engine power briefly reduced during wheel spin

Repair estimate

DifficultyEasyDIY possible
Parts and labour€0–400
Time0–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

awd clutch bawd control module

Related codes

C05ECC05EDC05DCC0093

References: patents.google.com, patents.google.com, mobilityengineeringtech.com, static.nhtsa.gov.