Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
U11B9-00Lost Communication With RF Hub
Manufacturer communications
9Original wording in English
AUDI
This bulletin provides information when the volume control cannot be operated; background lighting is not working; DTC U11B900.
AUDI
This bulletin provides a software update when the volume control cannot be operated, background lighting not working; DTC U11B900 voume control, no communication.
JEEP
Not applicable to vehicles built for US market. Multiple Systems Repair Bundle Campaign Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● U11E3-00 - TCM Lost Communication With ESM On DPT CAN. ● B15A1-00 - Med…
AUDI
This bulletin provides information when the volume control is not working; MIB3. DTC U11B900.
Check vehicle applicability
49A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Audi | A3 ↗ | 2024 |
| Audi | A3 ↗ | 2023 |
| Audi | A3 ↗ | 2022 |
| Audi | A4 ALLROAD ↗ | 2019 |
| Audi | A4 ALLROAD ↗ | 2018 |
| Audi | A5 ↗ | 2025 |
| Audi | A5 ↗ | 2019 |
| Audi | A5 ↗ | 2018 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.