Pressure Feedback Exhaust Sensor: Description and Operation
ENGINE CONTROL COMPONENTSExhaust Pressure (EP) Sensor
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.
