Code p401 - Ford Powerstroke Diesel Forum

 
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post #1 of 4 Old 03-01-2012, 03:21 PM Thread Starter
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Code p401

2006 F250 6.0 Powerstroke with an Edge tuner. EGR cooler has been deleted, left EGR valve in truck. I was towing my camper down to Charleston, SC and about 200 miles into the trip my CEL came on. Ran a diagnostic and it showed p0401 egr flow. When we arrived at the campground took the egr valve cleaned it and reset the computer. No CEL while we were there but about 200 miles up the interstate CEL came back on with same code. I have read on some forums that you cannot run the 2006 without the egr valve so blocking it off is no option. I hate to purchase a new egr valve so does anyone have any ideas?

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post #2 of 4 Old 03-01-2012, 04:21 PM
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wait what? you are running a cooler delete, I hate to point out the obvious but with no cooler you are going to throw a P0401 insufficient EGR flow code.

it doesn't matter if the valve is in place or not. with no cooler there is going to be no flow and the PCM is going to know this

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post #3 of 4 Old 03-01-2012, 05:02 PM Thread Starter
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Guess that explains it... thought as long as the egr valve was still in place it wouldn't throw a code. So just learn to live with the CEL...
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post #4 of 4 Old 03-01-2012, 05:20 PM
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Or get an SCT with or without custom tunes and you can turn it off. Problem solved.

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