Intrigue V6-3.8L VIN K (1998)
Manifold Pressure/Vacuum Sensor: Description and Operation
Manifold Absolute Pressure Sensor
The Manifold Absolute Pressure (MAP) sensor responds to changes in intake manifold pressure. The PCM supplies a 5 volt reference and a ground for
the MAP sensor. The MAP sensor provides a signal to the PCM relative to pressure changes in the manifold. The MAP sensor signal voltage to the PCM
varies from below 2 volts at idle (low manifold absolute pressure - high vacuum) to above 4 volts with the key ON, engine not running or at wide-open
throttle (high manifold absolute pressure - low vacuum). The MAP sensor is used to determine manifold pressure changes while the linear EGR flow test
diagnostic is being run (refer to DTC P0401), to determine engine vacuum level for other diagnostics and to determine barometric pressure (BARO).
See: Testing and Inspection
If the PCM detects a voltage that is lower than the possible range of the MAP sensor, DTC P0107 will be set. A signal voltage higher than the possible
range of the sensor will set DTC P0108. An intermittent low or high voltage will set DTC P1107 or P1106 respectively.
