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International Automotive Technicians Network
Re: I guess I don't understand Mercedes EGR monitor theory
Posted to Technical Discussion Forum on 2/26/2021

Definitely check the MAP sensor cracked hoses carbon in the ports. It's kinda like a GM or toyota MAP is there to confirm vacuum change when egr is functioning for OBD2. Has nothing to do with fuel calculation if there's a MAF sensor also. Login to read more.