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Fuel Tank Pressure Sensor (CNG): Service and Repair



FUEL TANK PRESSURE SENSOR REPLACEMENT

TOOLS REQUIRED
J 45878 Combustible Gas Detector

REMOVAL PROCEDURE
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.

CAUTION:
- Refer to Compressed Natural Gas (CNG) Flammability Caution in Service Precautions.
- Refer to Compressed Natural Gas (CNG) Fuel Pressure Relief Caution in Service Precautions.

2. Disconnect the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.




3. Remove the tank cover (2).




4. Disconnect the fuel tank pressure (FTP) sensor connector (1).
5. Remove the FTP sensor (2) from the high pressure lock-off (HPL) solenoid.

INSTALLATION PROCEDURE




1. Install the fuel tank pressure (FTP) sensor (2) into the high pressure lock-off (HPL) solenoid with new O-ring. Lubricate the O-ring with petroleum jelly.

CAUTION: Refer to Compressed Natural Gas (CNG) O-Ring Caution in Service Precautions.

Tighten the fuel tank pressure sensor to 27 N.m (20 lb ft).

2. Connect the fuel tank pressure sensor (1) connector.
3. Install the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

4. Start the vehicle and inspect for CNG fuel leaks at the serviced fitting using the J 45878 or an equivalent liquid leak detector.




5. Install the tank cover (2).
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