Clear the AdBlue Warning Light on Your Fiat

The SCR system reduces pollutant emissions using AdBlue, a urea-based additive injected into the exhaust system. If the level is low or a fault is detected, the AdBlue warning light appears on the dashboard. This may be accompanied by a warning message or a countdown before the vehicle is prevented from starting. Sometimes, simply refilling the tank is enough, but if the light remains on, a diagnostic check may be required.

What does it mean?

Why does it appear?

How can you clear the warning light?

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What does the AdBlue warning light look like on a Fiat?

To locate the urea warning light on your Fiat, check your dashboard. In most vehicles, it’s located near the speedometer or tachometer.

It typically appears as a yellow/orange icon showing wavy lines under a cloud with two droplets.

Depending on the year and model of your vehicle, a warning message may also appear on the dashboard, possibly accompanied by a beep.

If you're unsure, refer to your vehicle’s user manual.

Why does the warning light come on?

Your UREA indicator light can turn on for several reasons, which need to be identified to apply the correct fix.

Firstly, if the light flashes or stays on, it likely means your AdBlue tank is nearly empty.

If you’ve already refilled the tank and the warning light remains on — or if the check engine light is also lit — it could indicate a more serious issue affecting the vehicle’s emission control system.

How to turn off the AdBlue warning light on a Fiat?

Manually clearing the AdBlue warning light

Refill the AdBlue tank: Use a fluid approved by the manufacturer to avoid damaging your vehicle.
Restart the vehicle: Sometimes restarting the car after refilling is enough to turn the warning light off.
Complete a drive cycle: In other cases, the light will go off after driving a few kilometers or completing a few trips.
Diagnostic check and repair: If the light stays on, book an appointment with an authorised service center or workshop. The issue may require deeper intervention, such as using a Car Diagnostics Scanner to check the electronic system.

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The warning light stays on after refilling

Crystallisation of the fluid: AdBlue can crystallise when exposed to air or low temperatures. The crystals may block the injectors or tank components, causing the SCR system to malfunction. You can use an anti-crystallisation additive each time you refill.
Injector issues: These components are crucial for AdBlue injection into the exhaust. They may get clogged by crystals or impurities in the fluid.
Tank issues: Overfilling or spilling AdBlue may deform the tank due to pressure build-up or crystal formation.
Stuck sensor: The level sensor may malfunction electronically and falsely detect an empty tank.
Electrical issues: Communication faults between components in the system may also trigger the warning.

How to turn off the AdBlue warning light with a Klavkarr scanner?

You can reset the AdBlue warning light on Fiat 500, Ducato... using the Klavkarr 210 or 310. Here's how:

Turn on the ignition
Plug the Klavkarr scanner into the OBD2 port
Open the EOBD-Facile app
Select your car make: "Fiat"
Then choose your model: "Ducato, Panda, 500, Tipo..."
Select the ECUs to scan, here "SCR/Reductant ECU"
Click "Next"
Select the "SCR/Reductant ECU"
Check the displayed fault codes
Clear the fault codes by selecting "Erase", then confirm with "OK"

To fully clear the AdBlue message from the dashboard after refilling the tank, also perform the following steps:

Go to "Special Functions" (only available with Klavkarr)
Select "Tank Reset" and click "Run"
Ensure ignition is on and click "OK"
Once completed, click “OK”
Turn off the ignition and wait a few minutes before restarting the car

Beware of the Security Gateway on newer models

Since 2018, Fiat has integrated a Security Gateway (SGW) system into several models. This electronic firewall blocks access to active vehicle functions through the OBD port — including clearing the AdBlue warning light.

If you use a standard diagnostics tool and can’t access the ECU for emissions additive, it’s likely due to this security system.

Using an SGW bypass is essential. It’s an adapter that connects between the scanner and the OBD port to restore access to maintenance functions.