DTC P0108-00: Manifold Absolute Pressure/Barometric Pressure Circuit High Input: General Description
WARNING: This page is about a different car, the 2021 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.
Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is installed on the surge tank. It senses absolute pressure of the surge tank and transfers the analog signal proportional to the pressure to the ECM/PCM.
By using this signal, the ECM/PCM calculates the intake air quantity and engine speed.
The MAPS consists of a piezo-electric element and a hybrid IC amplifying the element output signal. The element is silicone diaphragm type and adapts pressure sensitive variable resistor effect of semi-conductor.
Because one side of the silicone diaphragm is 100% vacuum and the other is affected by the manifold pressure, this sensor can output analog signal by using the silicone variation proportional to pressure change.