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How do you reset the AdBlue warning light on the Peugeot 508?

Model: Peugeot 508 MK 2 - Years: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: AdBlue warning light

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Video tutorial

To reset the AdBlue warning light on the Peugeot 508, you first need to top up the fluid by inserting the necessary amount of additional liquid: this can be done by removing the blue cap next to the fuel tank cap. Once the cap is removed, you can add the necessary amount of liquid; then you can connect a computer to the OBD port of the car, located under the steering column.

After the connection, you can clear the error that causes the warning light to come on and verify that everything is functioning correctly.


Posted on 2 August 2025 by ScegliAuto


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Watch the video!


by ScegliAuto

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