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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 >> General Description

General Information: General Description

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.

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 and PTS calibration are essential.

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