Differential Pressure Sensor

WARNING: This page is about a different car, the 2012 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Differential Pressure Sensor (DPS) Metal Tubing Fitting, DPS Electrical Connector, DPS Hose & Bolt

Courtesy of CHRYSLER GROUP, LLC

The Exhaust Differential Pressure Sensor (2) is remotely mounted on the transmission housing. One pressure tube (3) measures back-pressure created by the valves located at the cold end of the exhaust system. The sensor monitors the pressure in the exhaust system and determines if the valves are working properly for engine performance.

Fig 2: Active Exhaust Valves (AEV), Valve & Spring Tension

Courtesy of CHRYSLER GROUP, LLC

The valve (1) is located in the cold end of the exhaust pipe, are spring loaded and control the back pressure for optimal engine performance. When the engine is in full performance mode. The valves will open to full when the conditions require it. When the engine is in economy mode. The valve will slightly close. When the engine is at idle. The valve will close completely to control the noise created by the engine.