1999 turbodiesel code P0400

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1999 turbodiesel code P0400

10-18-2018, 08:14 PM

packerfan

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Join Date: Dec 2016

Location: Green Bay, Wi (frozen tundra)

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1999 turbodiesel code P0400

P0400 code came on, (EGR Flow).
I'm wondering if I may have a vacuum leak somewhere because when I turn the heater on and select air flow to the floor the flap doors do not open to direct air to the floor.
What should I be looking for to find what it causing the P0400 code and how to fix it?

Thanks,
Rick

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