C128B Code: Meaning, Causes, and Symptoms | OBD2 Codes
C128B – ABS Master Cylinder Pressure Sensor Offset Error
C128B Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C128B Possible Causes
Faulty Brake Pressure Modulator,Brake Pressure Modulator harness is open or shorted,Brake Pressure Modulator circuit poor electrical connection
The Electronic Brake Control Module (EBCM) uses input from the master cylinder pressure sensor for more accurate control during a vehicle stability enhancement system event. The master cylinder pressure sensor is internal to the brake pressure modulator.