This step is mandatory if you want to use the manifold pressure as engine load indicator for normal operation detection and use for this purpose the NOX monitoring mode MAP Naturally Aspirated or MAP Turbo in the EasyNOₓ (see section Preferences). In that case, you need to determine the manifold pressure that indicates the start of normal operation on the intake side of your engine (for example 30 % nominal load as per VDMA 6299:2019-09 or nominal load as per the engine manufacturer's specifications). In the case of a naturally aspirated engine, this manifold pressure must then be undercut, in the case of a turbocharged engine it must be exceeded.