Manifold Absolute Pressure (MAP) Sensor

A scan tool displays manifold pressure in kPa and Manifold Absolute Pressure (MAP) sensor signal voltage. Low pressure (high vacuum) displays a low voltage while a high pressure (low vacuum) displays a high voltage. A failure in the MAP sensor circuit should set a DTC P0107 or P0108 and using the applicable table will lead to the cause of the problem. A DTC P0108 may be set if misfire or a rough or unstable idle exists. A DTC P0105 will set for a MAP sensor that intermittently sends a zero voltage signal to the PCM. MAP Sensor Output Diagnosis can also be used to check the MAP sensor.