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P0401

4K views 8 replies 2 participants last post by  6.4twins 
#1 ·
(P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient Detected)

Anyone know what causes this? This is why I got the Spartan so I could delete this code but would one day like to find a real fix. I do have a after market ext.
 
#8 ·
I put every thing back to stock for now. I updated my tuner and Mick sent me the new strategy tunes and I am running a stock plus 125hp tune with no problems. The only problem I ran accross was that the tuner no longer liked my stock tune any more. Mick sent me a new stock file and all seams well for now. THANKS MICK.... I will run it with the stock plus 125hp for a few more weeks to see if any codes pop up. If not I will be removing the dpf again.
 
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