DTC P0105: Map Sensor Circuit Range/Performance: Description

The PCM supplies a 5-volt reference circuit and a low reference circuit to both the Throttle Position (TP) sensor and the Manifold Absolute Pressure (MAP) sensor. The TP sensor sends a voltage signal back to the PCM relative to the throttle plate opening, and the MAP sensor sends a voltage signal back to the PCM relative to the intake manifold pressure. The PCM can detect if the TP sensor or the MAP sensor are out of range by comparing the 2 values against the high and low limits and engine speed defined within the engine calibration. If the TP or MAP are not within the expected limits of the engine calibration, DTC P0105 sets.