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International Automotive Technicians Network
Re: p0401-EGR insufficient flow returning every time
Posted to Technical Discussion Forum on 10/10/2017

Do not put any other parts on this truck.

You need to go after this as a function check first. Scan tool hooked up, engine at operating temp.

Now with scan tool, command egr to 100%, the engine should stall or be REAL close to stalling. At same time how h... Login to read more.