![]() ![]() Install Special Tool 6856 to fuel pump module locknut and remove locknut (Fig. (5) The plastic fuel pump module locknut is threaded onto fuel tank (Fig. Refer to Quick-Connect Fittings for procedures. (4) Disconnect fuel return and pressure lines from fuel pump module fittings (Fig. (3) Thoroughly wash and clean area around pump module to prevent contaminants from entering tank. (1) Perform Fuel System Pressure Release Procedure. BEFORE SERVICING FUEL PUMP MODULE, FUEL SYSTEM PRESSURE MUST BE RELEASED. WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF). Refer to Fuel Pump, Fuel Filter/Fuel Pressure Regulator and Fuel Gauge Sending Unit.įuel tank removal will be necessary for fuel pump module removal. ![]() If the electrical fuel pump requires service, the entire fuel pump module must be replaced. The fuel gauge sending unit and pick-up filter may be serviced separately. Fuel gauge sending unit (fuel level sensor).A gasket between tank flange and module.A threaded locknut to retain module to tank.A separate fuel pick-up filter (strainer).Unfortunately my CO-worker's vehicle cannot pass inspection with the light on and the dealer cannot diagnose the problem.The fuel pump module (Fig. The vehicle has been back to the dealer on numerous occasions and the cause has yet to be discovered. A CO-worker has a 2002 Grand Cherokee and the mil comes on intermittently. ![]() In addition, the dealerships are profiting by repairing these weak components at the owners expense. These evaporative leaks present a danger to the vehicle operators (escaping gas fumes) and the environment. I believe the emission system components on these vehicles are weak. Since this emission component was no longer under warranty the repair cost of $293. ![]() A leak from a vapor hose was the cause this time. This time the dtc was p0456 - small leak from the evaporative system. On 8/19/08 (mileage 21,351) the vehicle was again returned to the dealer because the mil was on. A leak was found at the fuel pump seal and was replaced under warranty by the dealer. The diagnostic trouble code (dtc) was p0455 - large leak from the evaporative system. On 12/23/06 (mileage 11,948) my vehicle was returned to the dealer because the engine malfunction indicator light (mil) had illuminated and remained on after several normal driving cycles. ![]()
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