Water In Fuel Indicator: Description and Operation

WATER-IN-FUEL WARNING LAMP - ECM INPUT
The water-in-fuel warning lamp is located on the instrument panel.

The Engine Control Module (ECM) turns on the water-in-fuel warning lamp if water is detected in the diesel fuel. The lamp will illuminate for about two seconds each time the key is initially turned to the ON position as a bulb check.

If the lamp continues to be illuminated, it signals an immediate need for service. Refer to Fuel Filter/Water Separator Removal/Installation for water draining procedures.

Also refer to Water-In-Fuel Sensor - ECM Input for additional information.