P0401 and P0404 question [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: P0401 and P0404 question


mossmissle
03-30-2006, 01:14 PM
I have added the banks exhaust, ram air, six gun, and PDA. I am getting the P0401 and P0404 codes every time I get on it. Are these codes something that I need to worry about or can I just keep on truckn' ????

DSTRBD
03-30-2006, 03:03 PM
Are you setting the CEL? If not, no worries. If you are, the truck is not running up to its full potential. Did you get rid of the cat? If not, try putting your stock airbox back in and I bet the codes go away. You may also want to go to the dealer to get the latest reflash as this has cured some 401 and 404 cases.

mossmissle
03-30-2006, 04:23 PM
Are you setting the CEL? If not, no worries. If you are, the truck is not running up to its full potential. Did you get rid of the cat? If not, try putting your stock airbox back in and I bet the codes go away. You may also want to go to the dealer to get the latest reflash as this has cured some 401 and 404 cases.

I am not getting the CEL. I don't want to put the stock air box back in I just paid 369 for this ram air deal....that would suck. I talked to the dealer and they said to bring it in, but they will just point there finger at the exhuast and ram air.