Amber light
Water In Fuel Warning
The diesel fuel filter has collected water that must be drained.
High risk
Have the water drained soon. Water in diesel can damage the injection system.
Short answer · Can I drive with the water in fuel light on?
Drive only to a workshop or until you can drain the filter as described in the handbook. Water can damage the high-pressure pump and injectors.
What to do
- Drain the filterMany filters have a drain screw; follow the handbook.Diesel is harmful to skin and the environment; collect it properly.
- Replace the filter if neededSome filters cannot be drained and must be replaced.
- Think about the last fill-upRepeated warnings may mean contaminated fuel.
How is the light behaving?
| What you see | What it usually means | What to do |
|---|---|---|
| Steady | Water in the fuel filter | Drain or replace the filter soon |
Possible causes
- Water collected in the filterNormal condensation over time.
- Contaminated fuelFuel from a station with water in its tanks.
- Faulty sensorThe sensor reports water that is not there.
Don't confuse it with
Questions about Water In Fuel Warning
Does every diesel have this light?
Many diesel cars have it, but not all; check the handbook.