Hey Guys I'm a newbie trying to crack a code I'm showing a po405 is this a bad egr I've only got 45k on the truck

 

It could be but you need to pull it off and clean it first as well as ensure that the prots are n ot clogged that are in the intake, where the egr goes. Mor often than not it tends to be the DPSE sensor gone bad over the EGR. clean the ports first then reset the cpu and see what happens

Lance

 

ok I'll try that by the way whats the dpse? I'm new at this.

 

That is a black or silver rectangle box by the egr valve. It is a sensor, there are two hoses that come off of it. It is associated with the operation of the EGR.

Lance

 

I got from your pf that you have an '02 F-150, what engine is in there? here's a diagram of the EGR system that'll help you out.
http://i.b5z.net/i/u/1223630/i/cuz/IMG_0467.JPG
there are two diff. DPFE sensors, I have the 4.2 in my '02,

this is the DPFE
http://i.b5z.net/i/u/1223630/i/cuz/IMG_0456.JPG

just for grins, this is the valve
http://i.b5z.net/i/u/1223630/i/cuz/IMG_0457.JPG

and here's zoomed out a little
http://i.b5z.net/i/u/1223630/i/cuz/IMG_0458-2.JPG

 

My 4.6 has those located on the other side (2000 F150 4.6). So I guess depending on the engine they are located in different areas.

Lance

 

It's the 4.6, thanks for the info guys

 

A P0405 usually is due to either a faulty DPFE sensor or a fault in the wirring associated with it.

Steve

 

Would you know how I could check it?

 

apply vacume to the EGR Valve while the engine is idling. If it studders or dies the ports and valve are fine. which oughta be the case with so few miles on it. then it's safe to assume it's prolly the DPFE.
To apply vacume. get a piece of vacume line and put it on the valve, then put the other end somewhere on the intake manifold where there's vacume at idle, or just suck on the end.

 

If you have a 4.6, you might as well pull off the throttle body, clean the EGR ports and replace your DPFE sensor. 4.6's are bad about clogging with carbon.

 

Thanks to all in advance. I've got the same error code on a 4.6L with 45K miles. I reset the error code once and it came back after about 15-20 miles.

Paul

 

Hi paul and welcome to the forum

EGR codes are pretty popular on here. If you search in here you'll probably find more info than you can imagine.
A few posts up woogs has good advice on checking the system.
Where I live the most common problem is a bad DPFE sensor.

 

Thanks Guys for the responces,but I had about a foot of water in my house from Rita so I haven't had time to fool with the truck. Things are kinda getting back to normal if you can call it that waiting on the insurance adjustor you never know how much stuff you have till you lose it.

 

By the way it might seem that code might be set on a mileage timer also is there a way to reset the code other than going to the Zone?