Chassis, generic

C05FB 4WD/AWD Range Actuator Position Sensor Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

General electrical fault in the circuit of the sensor that reports where the range actuator stands, without narrowing it to low, high or implausible. Designs vary: Magna mounts a programmable linear Hall IC on the transfer case housing that reads a stepped sector plate or the range fork and outputs a duty cycle; BorgWarner uses a single sensor whose probe rides five plateaus on the cam; GM full-size trucks combine rotary and incremental position sensors in the encoder motor. Stellantis files comparable faults under the separate SAE codes C00A7-13 and C00A8-13 (actuator position sensor A or B circuit open), triggered in bulletin 08-237-23 by an unseated connector. No maker documents C05FB itself; C05FD and C05FE are the narrower variants.

Likely causes

Sensor or actuator connector not fully latched
Open supply, ground or signal wire of the position sensor
Failed position sensor, often integrated in the shift motor

Symptoms

  • 4WD service message, range shifts disabled
  • Range indicator blank or flashing
  • Further transfer case codes stored at the same time

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–3 h

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

Parts involved

range pos sensortransfer case control module

Related codes

C05FCC05FDC05FEC00A7C00A8

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