BMW DTC P105B – Internal Control Module VVL Error, Voltage Too Low
DTC P105B meaning on BMW
DTC P105B is an OBD-II diagnostic trouble code that indicates an Internal Control Module Variable Valve Lift (VVL) Error, with the voltage being too low in a BMW vehicle. This fault code is specific to BMW vehicles and is related to the Variable Valve Lift system.
BMW DTC P105B symptoms
Symptoms of DTC P105B in a BMW may include engine misfires, rough idling, reduced engine performance, decreased fuel efficiency, and in some cases, the vehicle may go into a limp mode where power is limited.
BMW DTC P105B causes
The most common causes of DTC P105B in a BMW include a faulty Variable Valve Lift system, a malfunctioning VVL control module, wiring issues, low engine oil level, or a failing VVL solenoid.
BMW DTC P105B seriousness
While DTC P105B may not always result in immediate drivability issues, it is important to address this fault code promptly to prevent potential engine damage and ensure optimal performance of the Variable Valve Lift system in the BMW.
How to diagnose DTC P105B on BMW
To diagnose DTC P105B on a BMW, a diagnostic scan tool capable of reading BMW-specific fault codes is required. The technician will need to inspect the Variable Valve Lift system components, check the VVL control module, test the VVL solenoid, and verify the wiring integrity to identify the root cause of the fault code.
How to fix DTC P105B on BMW
Fixing DTC P105B on a BMW typically involves replacing any faulty components identified during the diagnostic process. This may include replacing the VVL control module, repairing damaged wiring, replacing the VVL solenoid, or addressing any other issues related to the Variable Valve Lift system.
How to erase DTC P105B on BMW
Once the underlying issue causing DTC P105B has been resolved, the fault code can be cleared using a diagnostic scan tool. By clearing the code, the Check Engine Light will turn off, indicating that the fault has been addressed and the system is functioning properly.
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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