Exhaust Pressure (EP) Sensor
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The EP sensor is a 3-wire variable capacitance sensor that is supplied a 5.0 volt reference signal by the PCM and returns a linear analog voltage signal that indicates pressure. The sensor voltage input to the PCM increases as the pressure increases.
The EP sensor measures the pressure in the exhaust manifold. The EP sensor signal is used for pressure correlation with the manifold absolute pressure (MAP) sensor and input for exhaust gas recirculation (EGR) valve control.
The EP sensor is located at the left rear of the engine. It is attached to an extension tube from the right hand up pipe going to the turbocharger.