Buick 12621292 Sensor Assembly, Fuel Pressure

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To install the sensor, simply reverse the removal steps and tighten it to the specified torque.

Disconnect the electrical connector from the EVAP purge control solenoid valve, which is located on the top of the intake manifold, next to the throttle body. Then, disconnect the hose. Unscrew the bolt and remove the purge valve from the upper intake manifold. Installation is the reverse of removal. For the fuel tank pressure sensor, remove the fuel tank. Disconnect the electrical connector and pull the fuel tank pressure sensor from the fuel pump module. Installation is the reversal of removal. To remove the EVAP canister, raise the vehicle and support it securely on jackstands. Remove the fuel tank. Disconnect the electrical connector from the canister vent solenoid valve. Disconnect the hoses from the canister, which is located on top of the fuel tank, at the rear. Remove the retainer securing the canister on top of the fuel tank and remove the canister. Installation is the reverse of removal.

The next step is to relieve the fuel system pressure.

Remove the engine covers and the suspension crossbrace. On 3.6L models, remove the intake manifold and the foam insulator.

After relieving the fuel system pressure, you should disconnect the FRPS electrical connector.

There are four different versions of the fuel pressure sensor. V6 engines have one on the fuel rail and one on the fuel feed pipe near the fuel tank (2010 and 2011 models) or mounted on a Hitting on the fuel tank or directly on the fuel tank with no Hitting (2012 and later models). V8 models only have one sensor, on the fuel feed pipe near the fuel tank (2012 and earlier models) or mounted on a Hitting on the fuel tank or directly on the fuel tank with no Hitting (2013 and later models). To replace the fuel pressure sensor, start by removing the fuel tank filler cap to relieve fuel tank pressure. Then, relieve the fuel system pressure and disconnect the cable from the negative battery terminal. For V6 engines with the fuel pressure sensor on the fuel rail, remove the engine covers and intake manifold, and cut the plastic tie to disconnect the electrical connector from the sensor. Unscrew the sensor from the fuel rail and install the new sensor. For V6 engines with the fuel pressure sensor on the fuel feed line, raise the rear of the vehicle and locate the sensor in the fuel delivery line. Disconnect the electrical connector and use a quick-disconnect tool to remove the sensor from the fuel line. For V8 models with the fuel pressure sensor on the fuel feed line, raise the rear of the vehicle and locate the sensor on the right side of the tank. Disconnect the electrical connector and unscrew the sensor from the fuel line. Apply a small amount of engine oil to the new O-ring and install the sensor. For V8 models with the fuel pressure sensor directly on the fuel tank, disconnect the sensor from its retaining clip on the fuel tank and detach the quick-connect fuel line fitting. Install the new sensor, applying engine oil to the new O-ring before installation.

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.

Disconnect the electrical connector from the EVAP purge control solenoid valve, which is located on the top of the intake manifold, next to the throttle body.

Disconnect the electrical connector from the sensor and unscrew the sensor from the fuel rail.

Next, relieve the fuel system pressure and wait for at least two hours before proceeding.