Water In Fuel Lamp (Export)

The Water In Fuel Lamp is located in the instrument cluster. When moisture is found within the fuel system, the sensor sends a message via the PCI data bus to the instrument cluster. The sensor is located underneath the vehicle, directly above the rear axle. The sensor is housed with in the fuel filter/water separately. If found defective, the entire assembly cover must be replaced.

The Water In Fuel Sensor is a resistive type switch. It is calibrated to sense the different resistance between diesel fuel and water. When water enters the fuel system, it is caught in the bottom of the fuel filter/water separator assembly, where the sensor is located. Water has less resistance than diesel fuel. The sensor then sends a PCI data bus message to the instrument cluster to illuminate the lamp.

If the lamp is inoperative, perform the self diagnostic test on the instrument cluster to check the lamp operation before continuing diagnosis.