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How to Fix Error Codes P13C271 and P045B71 on a Mercedes B-Class

Model: Mercedes Classe B MK 3, W247 - Years: 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Warning light – error code

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Video tutorial

The codes P13C271 (EGR Position) and P045B71 (Low EGR Actuation) on a Mercedes B-Class 2.1 diesel indicate a problem with the EGR valve or its actuator. The most common cause is carbon build-up that blocks movement.

Before replacing the valve (costing around £60-70 for an OEM replacement), try cleaning it: remove the valve and thoroughly clean the carbon deposits with a specific cleaner and a brush. If the errors persist after cleaning, replace the actuator (the component that operates the valve).

This failure is quite common on these engines. Regular cleaning can prevent the issue.


Posted on 21 August 2026 by ScegliAuto


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