P124A – BMW DTC

BMW DTC P124A – Brake Booster Pump Cut-Off, Permanent Operation

DTC P124A meaning on BMW

The DTC P124A error code on BMW vehicles indicates a Brake Booster Pump Cut-Off, Permanent Operation fault. This fault occurs when the brake booster pump continues to run continuously, even when it is not required to do so.

BMW DTC P124A symptoms

Symptoms of the BMW DTC P124A error code may include:

• Continuous operation of the brake booster pump
• Increased noise from the brake booster pump
• Possible decrease in brake performance

BMW DTC P124A causes

The common causes of the BMW DTC P124A error code include:

• Faulty brake booster pump
• Wiring or electrical issues
• Software glitches

BMW DTC P124A seriousness

The DTC P124A error code should not be ignored as it can lead to potential safety issues due to compromised brake performance. It is recommended to address this issue promptly to ensure the proper functioning of the brake system.

How to diagnose DTC P124A on BMW

To diagnose the DTC P124A error code on a BMW, you can perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the brake booster pump for any visible damage or signs of malfunction
3. Check the wiring and connections related to the brake booster pump
4. Perform a brake system test to assess the overall functionality

How to fix DTC P124A on BMW

To fix the DTC P124A error code on a BMW, you may need to:

1. Replace the faulty brake booster pump
2. Repair any damaged wiring or connections
3. Update the software to address any glitches
4. Perform a system reset to clear the error code

How to erase DTC P124A on BMW

To erase the DTC P124A error code on a BMW, you can:

1. Use a diagnostic scanner to clear the fault codes
2. Address the underlying issue causing the fault code
3. Perform a test drive to ensure the error code does not reappear

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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