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Re: I guess I don't understand Mercedes EGR monitor theory
Posted to Technical Discussion Forum on 2/25/2021 7 Replies

The EGR malfunction (function chain) works like most other systems that use the MAP sensor (intake manifold pressure sensor to Mercedes).

1. Fault code: P2001 (P0400) 2. Fault storage: Illuminate check engine light after 2 successive drive cycles with faults... Login to read more.

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