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I think you have a typo on the P4011 code .

Anyway, the vac line Scotty mentioned [ under front cover] is a white plastic line..they crack from engine heat and should be replaced with a rubber one.
That line is a COMMON engine vac.feed for both the AIR system and the EGR system Switch-Over-Valves.
So, if that vac line is broken. it would bring on BOTH those codes .
One code is EGR and the other is AIR system..codes P0400 and P0411..

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A Dalton