C1421 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1421 – Open Or Short In Master Cylinder Pressure Sensor
C1421 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1421 Possible Causes
Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor),Brake Actuator Assembly harness is open or shorted,Brake Actuator Assembly circuit poor electrical connection
C1421 Description
The Master Cylinder Pressure Sensor is connected to the Skid Control ECU in the brake actuator assembly. The Skid Control ECU monitors the Master Cylinder Pressure Sensor. The Skid Control ECU sets the OBDII code when the Master Cylinder Pressure Sensor is not to factory specifications.