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Home >> Hyundai >> 2017 >> Sonata Plug-In Hybrid >> Repair and Diagnosis >> External Pages >> Different car >> Section 130 (Active Hydraulic Booster (AHB) System Diagnosis (HEV)) >> DTC C1237: Primary Pressure Sensor - Signal >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

WARNING: This page is about a different car, the 2015 Hyundai Sonata. However, it is still accessible from the selected car via links, so may be relevant.
Item Detecting Condition Possible Cause
DTC Strategy
  • Voltage Monitoring
  1. Faulty Bleeding Process
  2. leakage on hydraulic pipe lines
  3. Faulty pressure sensor
Enable Conditions
  • In case of Pressure sensor offset that calculated during driving is over 15bar
  • ECU compare the deviation pressure signal [HPA, BCP, ESC MCP]. If the change of pressure signal is discordant, ECU detect failure
Fail Safe
  • EBD warning lamp is activated and buzzer is not activated
  • "Check Brake!" message is displayed on LCD
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