DTC C1422: Master Cylinder Pressure Sensor Zero Point High Malfunction: Description

The master cylinder pressure sensor is connected to the skid control ECU in the brake actuator assembly.

Fig 1: Master Cylinder Pressure Sensor Communication Diagram

DTC No.	DTC Detection Condition	Trouble Area
C1422	When the stop light switch is OFF, the PMC terminal voltage is more than 0.86 V for 5 seconds or more.	Stop light switch Stop light switch circuit Master cylinder pressure sensor circuit Brake actuator assembly (Master cylinder pressure sensor)