The DTC code P0108 OBD2 refers to a problem in the MAP sensor circuit (Multiple Absolute Pressure Sensor) and indicates that there is a voltage input that is too high for the PCM (Power Train Control Module).
The MAP (Manifold Absolute Pressure) sensor delivers information on the voltage reading as it changes to the PCM (Powertrain Control Module) through a signal cable.
When the engine vacuum increases, the voltage reading is low. When the vehicle is idling, the voltage should be at 1 volt and about 5 volts when the vehicle is accelerated. In case the PCM notices that the MAP sensor voltage reading is not within the expected range, diagnostic code P0108 is established.