I GOT THE CODES PULLED OUT OF MY TRUCK F-150 V8, 4.6
THE PO 401 CAME OUT, CAN SOMEONE TELL ME HOW CAN I FIX IT. THANKS

 

You can probably figure out something by reading some of these:

Search results for "p0401"

Good luck !!

 

You can use this website too..
http://www.autotap.com/codes.asp

 

There are several reasons this code can appear. I just fixed my 98 F150 4.6 L 112,000 Miles with the same code. It turned out to be the EGR Ports were clogged with carbon. Disconnect the vacumn hose fron the ERG and cap it. Then apply vacumn (outside source) to the ERG while the engine is idling. If it continues to run smothly the ports are blocked. The engine should stumble or stall if the ports are clear. To clean them you will have to remove the throat from the manifold. The EGR Valve or the PDFE Switch could also be the problem.

How many miles are on it?

Good Luck