s.e.s light came on today, read codes and 3 came up.po325 knock sensor circut 1 bank 1 po401 egr flow insufficient and po704 clutch pedal position switch malfunction. I think the 401 is the dpfe sensor, right? the other ones i'm not sure of. My truck is a 2000 f 150 4.6 5 speed any help would be greatly appreciated .

 

So you have the 2000 model w/ M5OD-R2 Five speed Mazda Overdrive. That's JMC's specialty - He has, or had one in the past. - He has the same year truck as you I believe. There's no telling what JMC's has in his truck for a tranny nowadays But he had the same trans at one time. Maybe he will chime in, I'm not as familiar with those.

PO401 is easy enough - Tons of info on that as you prolly know.

A strange set of codes for me - It's better that someone else handles this one. I do know what the codes mean basically. What I don't know is the relation one might have with the other.

Not confident I could help much here, (that trans didn't make into to many trucks, just the work duty line I thought) so I'll listen to what others come up with for you.

Good Luck