C1421 Code – Open or Short in Master Cylinder Pressure Sensor

What are the Possible Causes of the Code C1421?
  • Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor)
  • Brake Actuator Assembly harness is open or shorted
  • Brake Actuator Assembly circuit poor electrical connection
  • Need help with this OBD II code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

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