OBD-II FAULT CODE
U2004
Audio Steering Wheel Control Unit is Not Responding
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for U2004.
- Multiple warning lights or modules not communicating
- Steering warning lamp or heavy/abnormal steering
- Low voltage
- Steering angle/torque sensor fault
- Power steering motor/module issue
- Wiring fault
- Check battery condition, module fuses, grounds and network connectors before replacing modules
- Check battery/charging system
- Calibrate steering angle sensor if required after repair/alignment
- Repair wiring/power supply, perform calibration, replace failed sensor/module after confirmation
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Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.