BMW DTC C0544 – Brake Pressure Sensor ‘B’ Circuit/Open
DTC C0544 meaning on BMW
DTC C0544 on a BMW indicates an issue with the Brake Pressure Sensor ‘B’ circuit being open or having a malfunction. The brake pressure sensor is a crucial component of the vehicle’s braking system, responsible for monitoring the hydraulic pressure within the brake system.
BMW DTC C0544 symptoms
Symptoms of DTC C0544 on a BMW may include:
- ABS warning light illuminated on the dashboard
- Brake system warning light activated
- Loss of ABS functionality
- Decreased braking performance
BMW DTC C0544 causes
The common causes of DTC C0544 on a BMW include:
- Faulty brake pressure sensor ‘B’
- Open or short circuit in the wiring related to the brake pressure sensor
- Corrosion or poor connection at the sensor or wiring harness
BMW DTC C0544 seriousness
The seriousness of DTC C0544 on a BMW should not be underestimated, as it directly affects the proper functioning of the vehicle’s braking system. Driving with this fault can compromise safety and lead to potential brake system failures.
How to diagnose DTC C0544 on BMW
To diagnose DTC C0544 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes from the vehicle’s ABS system
- Inspect the brake pressure sensor ‘B’ and its wiring for any visible damage or corrosion
- Perform a continuity test on the sensor circuit to check for open or short circuits
- Check the sensor’s voltage readings to ensure it is functioning within specifications
How to fix DTC C0544 on BMW
To fix DTC C0544 on a BMW, consider the following steps:
- Replace the faulty brake pressure sensor ‘B’ with a new, OEM part
- Repair any damaged or corroded wiring in the sensor circuit
- Ensure proper connection and secure mounting of the new sensor
- Clear the fault codes using a diagnostic scanner
How to erase DTC C0544 on BMW
To erase DTC C0544 on a BMW, follow these steps:
- Connect a diagnostic scanner to the vehicle’s OBD-II port
- Select the ABS system and navigate to the fault code menu
- Choose the option to clear the fault codes stored in the system
- Verify that the DTC C0544 has been successfully erased by rescanning the system
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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