Sensor-Water In Fuel: Description
WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
The water in fuel sensor (WIF) is located in the fuel filter housing The sensor detects the presence of water in the fuel. If water is present in the fuel, a signal is sent to the ECM and the ECM signals the instrument cluster, over the CAN bus, to illuminate the water in fuel warning.