BMW DTC P155B – Multifunction Steering Wheel (MFL) Interface, Timeout Telegram
DTC P155B meaning on BMW
The DTC P155B code on a BMW refers to a Multifunction Steering Wheel (MFL) Interface Timeout Telegram. This means that there is a communication issue between the multifunction steering wheel controls and the vehicle’s electronic control unit (ECU).
BMW DTC P155B symptoms
Some common symptoms of the DTC P155B code on a BMW may include:
- Malfunctioning steering wheel controls
- Loss of functionality of steering wheel buttons
- Warning light on the dashboard
BMW DTC P155B causes
The DTC P155B code on a BMW can be caused by various factors, including:
- Faulty multifunction steering wheel controls
- Wiring or connection issues
- Defective electronic control unit (ECU)
BMW DTC P155B seriousness
While the DTC P155B code may not directly affect the drivability of the vehicle, it is important to address the issue promptly to ensure the proper functioning of the steering wheel controls and to prevent any potential safety hazards.
How to diagnose DTC P155B on BMW
Diagnosing the DTC P155B code on a BMW typically involves using a diagnostic scanner to retrieve the fault codes stored in the ECU. Additionally, a visual inspection of the steering wheel controls and wiring may be necessary to identify any visible issues.
How to fix DTC P155B on BMW
To fix the DTC P155B code on a BMW, you may need to:
- Inspect and repair any damaged wiring or connections
- Replace the faulty multifunction steering wheel controls
- Reset the ECU to clear the fault code
How to erase DTC P155B on BMW
To erase the DTC P155B code on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECU. Once the issue has been addressed and fixed, clearing the fault code will reset the system and turn off the warning light on the dashboard.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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