What it means
It warns that water may have collected in the diesel fuel filter or separator. Amber commonly signals that the water should be drained or checked soon, but colour and exact behaviour vary by manufacturer.
What the symbol looks like: A fuel-filter shape with a droplet beneath it; the exact symbol and graphic vary by manufacturer.
Why it comes on
- Water collected in the fuel filter or separator
- Water-contaminated diesel fuel
- A faulty water-in-fuel sensor
- Damaged wiring or connector at the sensor
What to do
- Check the owner's manual for the warning's meaning and the approved response.
- Do not drain the filter yourself unless the manual describes the procedure and you can follow it safely.
- If the light remains, arrange for the filter or water separator to be checked promptly.
- If the engine runs roughly, loses power, or stalls, stop safely and seek assistance.
Can I keep driving?
Avoid unnecessary driving until the warning is checked, since water in diesel fuel can damage the fuel system. Stop safely if the engine misfires, loses power, or stalls.
Symbols and colours differ between makes and models. Your owner’s manual shows the exact lights of your car.