Fuel Pressure Sensor/Switch: Service and Repair

Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement

Removal Procedure




1. Remove the exhaust gas recirculation (EGR) valve cooler. Refer to Exhaust Gas Recirculation Valve Cooler Replacement (Exhaust Gas Recirculation Valve Cooler Replacement).
2. Disconnect the engine wiring harness electrical connector (1) from the fuel rail fuel pressure sensor wiring harness extension electrical connector.
3. Remove the fuel rail fuel pressure sensor wiring harness extension clip (3) from the wiring harness bracket.




4. Remove the EGR valve cooler rear bracket bolts and bracket.




5. Disconnect the fuel rail fuel pressure sensor wiring harness extension (1) from the fuel rail fuel pressure sensor.
6. Prior to removal, clean the fuel rail fuel pressure sensor and surrounding area thoroughly with solvent, such as GM P/N 12377981 (Canadian P/N 10953463) or equivalent.
7. Using compressed air, thoroughly blow dry the sensor and surrounding area.
8. Remove the fuel rail fuel pressure sensor (2).

Installation Procedure





Caution: Refer to Fastener Caution (Fastener Caution).

1. Install the fuel rail fuel pressure sensor (2).

Tighten the sensor to 70 Nm (52 lb ft).

2. Connect the fuel rail fuel pressure sensor wiring harness extension (1) to the fuel rail fuel pressure sensor.




3. Position the EGR valve cooler rear bracket to the cylinder head and install the bolts.

Tighten the bolts to 25 Nm (18 lb ft).




4. Connect the engine wiring harness electrical connector (1) to the fuel rail fuel pressure sensor wiring harness extension electrical connector.
5. Install the fuel rail fuel pressure sensor wiring harness extension clip (3) to the wiring harness bracket.
6. Install the EGR valve cooler. Refer to Exhaust Gas Recirculation Valve Cooler Replacement (Exhaust Gas Recirculation Valve Cooler Replacement).
7. Prime the fuel system. Refer to Fuel System Priming (Fuel System Priming).
8. Start the engine. If the engine stalls, repeat the above step.
9. Once the engine starts, inspect for fuel leaks.