Manifold Absolute Pressure And Temperature (MAPT) Sensor
WARNING: This page is about a different car, the 2019 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.
A single MAPT sensor is located in the intake manifold after the electric throttle. The sensor provides a voltage signal to the PCM relative to the intake manifold pressure and temperature.
The MAPT sensor has a 4 pin connector which is connected to the PCM and provides a 5V reference voltage from the PCM, a pressure and a temperature signal input to the PCM and a ground connection.
The MAPT sensor uses a diaphragm transducer to measure the air pressure.
The PCM uses the MAPT sensor signal for the following functions:
- Maintain manifold boost pressure
- Reduce exhaust smoke emissions when driving at high altitude
- Control of the EGR system.
If the MAPT sensor fails, the PCM uses a default pressure of 1013 mbar (14 lbf/in2 ). In the event of a MAPT sensor failure, the following symptoms may be observed:
- Altitude compensation inoperative (black smoke emitted from the exhaust).
- Active boost control inoperative.