F 450 2WD Super Duty V8-6.0L DSL Turbo VIN P (2006)
Manifold Pressure/Vacuum Sensor: Description and Operation
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
Manifold Absolute Pressure (MAP) Sensor
The MAP sensor is a variable capacitor sensor that is supplied a 5-volt reference signal by the PCM and returns a voltage signal to the PCM relative to
the intake manifold pressure. The sensor voltage increases as the pressure increases. The MAP sensor allows the PCM to determine the engine boost to
calculate fuel quantity. In addition, the MAP signal is used to control smoke by limiting fuel quantity during acceleration until a specified boost pressure
is obtained, and is used by the PCM for EGR system calculations and control.
A MAP signal fault detected by the PCM causes the PCM to calculate an estimated manifold pressure based on known engine conditions.
