Exhaust Pressure (EP) Sensor
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. 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 powertrain control module (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.