Brake Booster Pressure Sensor
WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
Brake Booster Pressure Sensor
Brake booster pressure sensor, installing on the brake booster, detects negative brake booster pressure in order to prevent abnormal braking from lack of negative pressure in brake booster.
In case that negative pressure lacks at idle start status, ECM release idle stop function (Engine start) in order to make proper negative pressure. If this DTC is set, No more idle stop functioning.