Parking brake function - Parking brake leakage detected
â–¶ How to fix
Check pneumatics, if no problems found in the pneumatic system, replace EPB ECU.
What you'll see
No driver-visible symptom recorded.
System reaction
No user functions restricted. Red warning lamp.
Diagnostic depth
Detection
When spring brake pressure falls below a predefined limit while vehicle is in motion and parking brake is released a significant leakage in EPB is detected. IV is activated to restore pressure.
Possible cause
Leakage in the parking brake system or pressure sensor error.