Q: How do you remove the fuel rail pressure sensor (FRPS) on Chevrolet Cobalt,HHR and Saturn ION?
A: Relieve the fuel system pressure first. Then, disconnect the Fuel Pressure Sensor (FRPS) electrical connector. To prevent fuel from entering the generator during FRPS removal and to catch some of the fuel from the fuel rail when the sensor is removed, place a towel on top of the generator. Using a 27mm socket, and being careful not to damage the foam insulator, remove the sensor. Fuel will drain from the opening in the fuel rail where the sensor was attached. This fuel must be washed away and the area dried prior to starting the vehicle. Installation is the reverse of removal. Upon starting the vehicle, immediately inspect for fuel leaks.