BMW DTC P155A – Multifunction Steering Wheel (MFL) Interface, Toggle-Bit Fault
DTC P155A meaning on BMW
The DTC P155A code on a BMW refers to a Multifunction Steering Wheel (MFL) Interface Toggle-Bit Fault. This fault indicates an issue with the communication between the multifunction steering wheel controls and the vehicle’s electronic systems.
BMW DTC P155A symptoms
Symptoms of the BMW DTC P155A code may include malfunctioning steering wheel controls, unresponsive buttons on the steering wheel, or error messages displayed on the instrument cluster related to the steering wheel functions.
BMW DTC P155A causes
The causes of the DTC P155A code on a BMW can vary, but common reasons include a faulty multifunction steering wheel module, wiring issues, or a communication error between the steering wheel controls and the vehicle’s control modules.
BMW DTC P155A seriousness
While the DTC P155A code may not directly affect the drivability of the vehicle, it can impact the convenience and functionality of the steering wheel controls. It is recommended to address this issue to ensure proper operation of the vehicle’s systems.
How to diagnose DTC P155A on BMW
To diagnose the DTC P155A code on a BMW, a diagnostic scan tool capable of reading BMW specific fault codes is required. The technician will need to inspect the multifunction steering wheel module, check the wiring connections, and perform communication tests to identify the root cause of the fault.
How to fix DTC P155A on BMW
Fixing the DTC P155A code on a BMW may involve replacing the faulty multifunction steering wheel module, repairing any damaged wiring, or reprogramming the control modules to establish proper communication. It is recommended to follow the manufacturer’s repair procedures to address this issue effectively.
How to erase DTC P155A on BMW
To erase the DTC P155A code on a BMW, a diagnostic scan tool capable of clearing fault codes is needed. Once the underlying issue has been resolved, the technician can use the scan tool to erase the fault code from the vehicle’s memory. This will reset the system and allow for proper operation of the steering wheel controls.
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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