Manifold Pressure/Vacuum Sensor: Testing and Inspection

Manifold Absolute Pressure Sensor

A scan tool displays manifold pressure in kilopascals (kPa) and MAP sensor signal voltage. Low pressure (high vacuum) displays a low voltage while a high pressure (low vacuum) displays a high voltage.

Circuit Problems

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 P0106 will set for a MAP sensor that intermittently sends a zero voltage signal to the PCM. The MAP Sensor Output Check located under Computers and Control Systems / Procedures / Diagnsotic Tables can also be used to check the MAP sensor. Testing and Inspection