B0403
Fuel Gauge Circuit Malfunction
1999-2000 BMW 528iT E39 2.8L I6 🇬🇧
Low SeverityBody
Description
The fuel gauge is not displaying correctly or is stuck at one position.
Symptoms
- Fuel gauge stuck on empty
- Fuel gauge stuck on full
- Fuel gauge reads erratically
- Low fuel warning inaccurate
Common Causes
- Faulty fuel level sending unit
- Instrument cluster gauge failure
- Wiring damage between tank and cluster
- Corroded fuel sender connector
- Float stuck in tank
Diagnostic Steps
- Check fuel sender resistance with scan tool
- Test gauge with simulated sender resistance
- Inspect fuel sender connector
- Test gauge stepper motor
- Check ground circuit
Repair Notes
Replace fuel level sending unit in tank or instrument cluster gauge. Check sender connector for corrosion.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
- B0012Driver Side Airbag Deployment Circuit Short to Ground
- B0013Driver Side Airbag Deployment Circuit Short to Battery
B0403 on Other Vehicles
Common Questions
What does code B0403 mean on a 1999-2000 BMW 528iT E39?
B0403 stands for "Fuel Gauge Circuit Malfunction". The fuel gauge is not displaying correctly or is stuck at one position.
What are the symptoms of B0403 on a BMW 528iT E39?
Common symptoms of B0403 include: Fuel gauge stuck on empty, Fuel gauge stuck on full, Fuel gauge reads erratically, Low fuel warning inaccurate.
What causes B0403 on a 1999-2000 BMW 528iT E39?
Common causes of B0403 include: Faulty fuel level sending unit, Instrument cluster gauge failure, Wiring damage between tank and cluster, Corroded fuel sender connector, Float stuck in tank.