P401

[nebulus83]

P 401 code on after I did the IPR gen 2 delete. The truck is a 03 I thought the 03 wouldn't throw a code? And the egr valve doesn't come out with those kits so I'm kinda confused.

[sinner6.0L]

I bet it doesn't set the check engine light though. That's the difference

[dhanna6powerstroke]

It will throw a code but doesn't usually set the check engine light.

[nebulus83]

Ya it set the light off, cleared it and and took it for a quick spin and it hasn't come back on yet. Just wondering why it would set the light off with the valve still in?

[dhanna6powerstroke]

It's not checking that the valve is there or not. The code is for insufficient flow to valve. Has insufficient flow because the cooler is gone.

[sinner6.0L]

I've never heard of an 03 setting light for EGR. I know a guy who runs with the latest calibration and the valve completely unplugged and it doesn't even set a light.

Any other codes besides insufficient flow?

[DoubleDpsd]

My cooler is blocked and ill get a 401 randomly like once a year. Cooler and valve installed. No big deal.

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[nebulus83]

No other codes yet! Wonder if I should get a block off kit and take it out?

[dhanna6powerstroke]

A block off would do the same thing. I wouldn't worry about it.

[Pistolgrip426]

my 04 chucks an 0401 and an 0403,never a cel.,I have a blockoff plate,but leave the valve plugged in,'cause I was having problems with clutch fan kicking in and out alot.