BMW DTC P0573 – Brake Switch ‘A’ Circuit High
DTC P0573 meaning on BMW
DTC P0573 on a BMW indicates a fault with the Brake Switch ‘A’ Circuit High. This means that the powertrain control module (PCM) has detected a high voltage signal from the brake light switch, which is used to inform the PCM when the brake pedal is pressed.
BMW DTC P0573 symptoms
Symptoms of DTC P0573 on a BMW may include:
- Brake lights staying on constantly
- Cruise control not working
- Difficulty shifting out of park
BMW DTC P0573 causes
Common causes of DTC P0573 on a BMW include:
- Faulty brake light switch
- Short circuit in the brake light switch circuit
- Corroded or damaged wiring in the brake light switch circuit
BMW DTC P0573 seriousness
While DTC P0573 is not a critical issue that affects the drivability of the vehicle, it can lead to safety concerns if the brake lights do not function properly. It is recommended to address this issue promptly.
How to diagnose DTC P0573 on BMW
To diagnose DTC P0573 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and check for any related codes.
- Inspect the brake light switch and its wiring for any visible damage or corrosion.
- Test the brake light switch for proper operation using a multimeter.
- Check for any short circuits in the brake light switch circuit.
How to fix DTC P0573 on BMW
To fix DTC P0573 on a BMW, you can try the following solutions:
- Replace the faulty brake light switch with a new one.
- Repair any damaged or corroded wiring in the brake light switch circuit.
- Clear the fault code and test the brake lights to ensure they are functioning properly.
How to erase DTC P0573 on BMW
To erase DTC P0573 on a BMW, you can use a diagnostic scanner to clear the fault code from the PCM’s memory. Once the code is cleared, you can verify that the issue has been resolved by checking for any reoccurrence of the fault code.
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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