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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/ Vacuum Brake Booster) - Diagnostic Codes (3 Of 4) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster) >> DTC C1422: Master Cylinder Pressure Sensor Zero Point High Malfunction [12/2017 - 09/2018] >> Description

DTC C1422: Master Cylinder Pressure Sensor Zero Point High Malfunction [12/2017 - 09/2018]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1422 Master Cylinder Pressure Sensor Zero Point High Malfunction When vehicle speed is 3 km/h (2 mph) or more and stop light switch assembly is OFF, master cylinder pressure continuously exceeds 1.764 MPa (18.0 kgf/cm2 , 255 psi) for 5 seconds or more.
  • Stop light switch assembly
  • Wire harness or connector
  • Skid control ECU (Brake actuator assembly)
  • Master cylinder pressure sensor (Brake actuator assembly)
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