C05FB4WD/AWD Range Actuator Position Sensor Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- 4WD service message, range shifts disabled
- Range indicator blank or flashing
- Further transfer case codes stored at the same time
- Likely causes
- LikelySensor or actuator connector not fully latched
- PossibleOpen supply, ground or signal wire of the position sensor
- PossibleFailed position sensor, often integrated in the shift motor
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.