C00A5Driveline Control Module Transfer Case Unit Control Circuit Driver
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C00A5 concerns the output stage in the driveline module that powers the transfer case actuator, typically a DC gearmotor that shifts range and mode or presses a multi-plate clutch. Bosch describes such a transfer case clutch driven by a DC motor with worm gear through an H-bridge, with motor speed, worm wheel position and motor current measured; Magna's shift patent regulates the gearmotor speed by PWM and switches to closed-loop position control near the end of travel. The code is set when the module sees a fault at its own driver, such as overcurrent, a short to ground or battery, an open load or thermal shutdown, the categories listed for H-bridge ICs like TI's DRV8873-Q1. The actuator itself is covered by C00A6. No manufacturer publishes a C00A5 case. The transfer case then usually holds its last state or drops to 2WD.
- What you may notice
- 4WD/AWD cannot be engaged or range shift refused
- 4WD service warning in the cluster
- Likely causes
- LikelyShorted transfer case motor wiring or connector
- PossibleBinding or worn transfer case motor causing overcurrent
- RareDefective H-bridge in the driveline module
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.