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AV-SCANNER / Service function guides / Fuel and emissions

Service function guideAdBlue and SCR System Reset

This guide covers the complete service and reset procedure for the AdBlue selective catalytic reduction (SCR) system, from understanding its operation to clearing the counters after repairs. It is written for working mechanics and experienced DIYers who already have diagnostic scan tool familiarity and want a structured, make-agnostic workflow. You will learn how to prepare the vehicle, perform the reset steps safely, verify the result with live data, and handle common failures across different vehicle types. By the end, you will be able to service the reductant system and clear its counters with confidence, using factory information for any model-specific values.

CategoryFuel and emissions
DifficultyProfessional
Time needed60 to 120 minutes
Length11 sections

Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.

Keep the full guide

Download all 11 sections as a branded PDF to use in the workshop.

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