3.2 LITER. Location-Secondary Air Injection Pipe. Sensor used to measure pressure inside the exhaust system. The manifold absolute pressure sensor provides instantaneous manifold pressure information to the engine's electronic control unit (ECU). To 06/30/2008. To 09/09/2013. To 11/14/2011. Exhaust Backpressure Sensor. Manifold Absolute Pressure Sensor. PRESSSENS. Thrust sensor. Included with: Connector tube.