P0401 is this bad? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 09-24-2009, 07:21 PM Thread Starter
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P0401 is this bad?

I keep getting this code and clearing it.....is this bad? I'm running the 275v4 maybe once a day,I don't want to take all the goodies off to take it in or should I ?


2008 F450 l/b dually 4x4 Lariat Blk/gld
Spartan 275 DPF delete and dual 6" Stacks
22.5" Alcoa Rims
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post #2 of 2 Old 09-24-2009, 07:36 PM
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That is an EGR valve issue. Monitor your EGR valve percentage under Generic OBDII parameters. Its most likely stuck closed since you are able to drive the truck.

Jeff Dodd

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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