Manifold Absolute Pressure And Temperature Sensor
WARNING: This page is about a different car, the 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
A single Manifold Absolute Pressure and Temperature (MAPT) sensor is located in the intake manifold, downstream of the electric throttle. The sensor provides a voltage signal to the Powertrain Control Module (PCM) relative to the intake manifold pressure and temperature. The MAPT sensor has a 4 pin connector which is connected to the PCM.
The connector provides the following connections:
- A 5V reference voltage from the PCM.
- A pressure and a temperature signal input to the PCM.
- 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 Exhaust Gas Recirculation (EGR) system.
If the MAPT sensor fails, the PCM uses a default pressure of 1013 mbar (14 psi).
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.