Reset the adBlue warning light on Renault vehicles

If you drive a Renault Clio, Master, Trafic… you may have encountered theAdBlue warning light, sometimes accompanied by a "Starting Impossible" message.

What does it mean ?

Why does it appear ?

How can you clear the warning light ?

What does the adBlue warning light look like on Renault ?

Locate the AdBlue warning light on your dashboard. It is usually found near the speedometer.

It appears as an orange pictogram featuring a wave-like line topped with a cloud.

Depending on your vehicle’s year and model, a warning message such as "… km lockout, refill AdBlue"may also appear on your dashboard.

If in doubt, refer to your car's service manual.

Why does the adBlue warning light turn on ?

The AdBlue warning light can turn on for various reasons. Identifying the cause is crucial for finding the right solution.

First, if the light is flashing or remains steady, your AdBlue tank is likely running low.

If the warning light stays on despite refilling or if the engine warning light is also illuminated, it may indicate a more serious issue affecting the vehicle’s emission control system.

How to turn off the adBlue warning light on Renault

Manually Resetting the AdBlue Warning Light

1. Refill the AdBlue tank : Use manufacturer-approved AdBlue fluid to prevent vehicle damage.
2. Restart the vehicle : Sometimes, turning the engine off and back on after refilling is enough to reset the warning light.
3. Drive a few kilometers : In some cases, the AdBlue warning light turns off after driving a certain distance or completing multiple trips
4. Run a diagnostic check : If the warning light remains on, visit an authorized service center or a garage. A deeper diagnosis may be required, possibly using a Car Diagnostics Scanner to check the electronic system.

The adBlue warning light stays on after refilling

Possible Reasons

• AdBlue crystallization : The fluid can crystallize when exposed to air or low temperatures, potentially clogging injectors or parts of the tank, leading to system malfunctions.
• Injector issues : Injectors are crucial for dispersing AdBlue into the exhaust system. They can become clogged with crystals or contaminants.
• Tank problems : Overfilling or overflowing the AdBlue tank can cause deformation due to excessive pressure or crystallization.
• Blocked sensor : The level sensor in the tank may malfunction electronically, making the system believe the tank is empty.
• Electrical issues : Communication problems between system components may also occur.

How to clear the adBlue warning light using the klavkarr scanner

It is possible to reset the AdBlue warning light on Renault vehicles using the EOBD-Facile software included with the Klavkarr 210 and 310. Here’s how :

1. Switch on your vehicle's ignition
2. Connect to your Klavkarr device.
3. Launch the EOBD-Facile application
4. Select the car brand :"Renault."
5. Choose your vehicle model: Scenic, Trafic, Master, Megane, etc
6. Keep the default option to scan the "Engine ECU" and "Additive ECU."
7. Click "Next"
8. Select your ECU by clicking on "Engine ECU"
9. Review the detected fault codes
10. Click "Clear" to erase the codes

If the warning light is still illuminated on your dashboard, perform the following additional steps:

1. Navigate to "Special Functions" (only available with the Klavkarr device)
2. Select "NOx System Fault Reset" and click "Execute"
3. Ensure the ignition is on and click "OK"
4. Once the process is complete, click "OK"
5. Turn off the ignition and wait a few minutes before restarting the vehicle

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That’s it for this guide on clearing the AdBlue warning light on your Renault. If you have any advice or questions, feel free to leave a comment.

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