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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 75 (Active Hydraulic Booster (AHB) System Diagnosis (HEV)) >> DTC C1235: Primary Pressure Sensor - Electrical >> General Information >> General Description

General Information: General Description

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There are three pressure sensors in HPU (Hydraulic Power Unit). They each measure high pressure accumulator pressure, booster pressure, pedal simulator pressure. AHB ECU (Electronic Control Unit) uses these measured values to monitor AHB operating status and control AHB.

After replacing AHB ECU, pressure sensor calibration is essential.