BMW DTC P120F – Brake Booster Pump Control Circuit Low
DTC P120F meaning on BMW
The DTC P120F error code on BMW vehicles indicates an issue with the Brake Booster Pump Control Circuit being detected as low. This means that there is a problem with the electrical circuit that controls the brake booster pump, which can impact the vehicle’s braking system.
BMW DTC P120F symptoms
Symptoms of the BMW DTC P120F code may include:
- Illuminated Check Engine Light on the dashboard
- Decreased brake assist functionality
- Unusual noises coming from the brake booster pump
BMW DTC P120F causes
Common causes of the BMW DTC P120F code include:
- Faulty brake booster pump
- Wiring issues in the brake booster pump control circuit
- Malfunctioning brake booster pump control module
BMW DTC P120F seriousness
The DTC P120F error code should be taken seriously as it can affect the proper functioning of the vehicle’s braking system. It is important to address this issue promptly to ensure the safety and performance of the vehicle.
How to diagnose DTC P120F on BMW
To diagnose the DTC P120F code on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the specific fault codes stored in the vehicle’s computer
- Inspect the brake booster pump and its control circuit for any visible damage or loose connections
- Test the brake booster pump control module for proper functionality
How to fix DTC P120F on BMW
To fix the DTC P120F code on a BMW, you may need to:
- Replace the faulty brake booster pump
- Repair any damaged wiring in the brake booster pump control circuit
- Replace the malfunctioning brake booster pump control module
How to erase DTC P120F on BMW
To erase the DTC P120F code on a BMW, you can:
- Use a diagnostic scanner to clear the fault codes stored in the vehicle’s computer
- After fixing the underlying issue, drive the vehicle to allow the system to retest and verify that the code does not return
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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