dtc

[excur05lord]

Recently did some upgrades to my '05 Excursion, one of which was a cold air intake. Now I'm running into a trouble code, 0402, every few days. I've been told by a diesel tech from a local ford dealer that it's because the engine can breathe better, the computer is freaking out due to all the air. Is there any way to stop this? Truck runs great, better than ever, just this damn code. looked up the code, EGR flow excessive.