What does the fuel filter warning light mean?
What does the fuel filter warning light mean? Once the level starts reaching maximum capacity, the fuel filter warning light will illuminate to let you know to empty the filter. On manual systems, a valve at the bottom of the filter will let the water drain out once opened. What happens if you have a bad fuel filter? Since the fuel filter allows the flow of fuel from the fuel tank to the fuel combustion system, any clogging in the fuel filter can put stress on the fuel pump. If the stress increased significantly, the fuel pump might get damaged...