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International Automotive Technicians Network
Re: Mercury Sable with a pesky P0401 EGR insufficient flow code
Posted to Technical Tips Forum on 10/24/2023

Hi Craig,

I learned the hard way many times over the years to study not only the code setting criteria but also study the overall running dynamics of a vehicle and understand the inputs and outputs of the various systems.

Much of the needed information is ... Login to read more.