How To Top Up AdBlue
Many modern diesels need AdBlue for their SCR system. Topping it up yourself is simple, as long as you use the right fluid and the right filler.
DifficultyEasy
TimeAbout 10 minutes
AreaOil and fluids
What you need
- AdBlue meeting ISO 22241From a canister or a pump at the fuel station.
- Cloth and waterTo wipe spills.
Step by step
- Find the AdBlue fillerIt has a blue cap, next to the diesel filler or in the boot. Check the manual.Never put AdBlue in the diesel tank or diesel in the AdBlue tank.
- Use the canister’s spoutMost canisters have a spout that fits the filler and stops spills.
- Fill the amount neededThe car may show how much is required. Do not overfill.
- Wipe any spillsUse water; dried AdBlue leaves white crystals.
- Switch on the ignitionSome cars need a short wait with the ignition on before the warning clears.
When to go to a workshop
If the warning stays on after filling, or a fault message about the AdBlue or emission system appears, have the system checked.
If diesel went into the AdBlue tank or AdBlue into the fuel tank, do not start the engine and call for assistance.
Questions about How To Top Up AdBlue
How long does AdBlue last?
Consumption depends on the engine and driving; the car warns in advance with a remaining distance.
What if it runs out?
Most cars will not restart until AdBlue is refilled, to stay within emission limits.