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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 114 (Antilock Brake System/Electronic Stability Control System Diagnosis (HEV)) >> DTC C1235: Primary Pressure Sensor - Electrical >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Voltage Monitoring
  1. Open or short of pressure sensor circuit
  2. Faulty pressure sensor
Enable Conditions
  • In case of Vp > 4.8 ± 0.1V or Vp < 0.2 ± 0.1V for 1s
  • In case of Vsum (Vpos + Vneg) > 5.0 ± 0.5V for 1s

* Vp: Pressure sensor voltage (It can be positive or negative voltage), Vpos: positive voltage, Vneg: negative voltage
Fail Safe
  • HPA pressure sensor
    • EBD warning lamp and buzzer are activated.
    • "Check Brake!" message is displayed on LCD.
  • Master cylinder pressure sensor
    • EBD warning lamp is activated and buzzer is not activated.
    • "Check Brake!" message is displayed on LCD.