Chassis, generic

C05E4 4WD/AWD Clutch A Position Sensor Circuit Intermittent

Check engine lightUsually off
EmissionsNot relevant
Drive cycleRequired
Limp modePossible

The clutch A position signal drops out or jumps for short moments and then recovers, so the controller sees implausible steps between consecutive samples. The pattern points to a loose pin, a chafed wire that touches only on bumps, or moisture in the connector near the axle, rather than a dead sensor. Bosch's actuator design measures worm wheel position together with motor speed, and Dana reads motor shaft position continuously while the clutch is applied, which makes short glitches visible. AWD may drop out briefly and come back after the next start. No manufacturer publishes C05E4. Permanent faults use C05E2 or C05E3.

Likely causes

Loose or corroded pin in the sensor connector
Harness chafing at the axle or subframe
Sensor with internal intermittent fault

Symptoms

  • AWD warning that comes and goes
  • Short losses of drive to the secondary axle

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,000
Time0.5–3 h

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

Parts involved

awd clutch a pos sensor

Related codes

C05E0C05E1C05E2C05E3

References: patents.google.com, patents.google.com.