C1391 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1391 – Abnormal Leak Of Accumulator Pressure
C1391 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1391 Possible Causes
Fluid Leakage,Faulty Brake Actuator Assembly,Brake Actuator Assembly harness is open or shorted,Brake Actuator Assembly circuit poor electrical connection
The Diagnostic Trouble Code (DTC) is stored if a brake fluid, internal or other leak is detected due to improper sealing in the actuator. Internal leakage is suspected if the pump motor operates frequently without breaking.