Question: Dont have the cash to fix the truck so I plugged up the vacuum hoses for the EGR and the IEVAP sensor,seems to be running and idling just fine the scanner says 695 RPM which is alot better than it was.I have no error codes not even pending ones.
My question: Is the EGR valve closed or open with no vacuum?

I thank you all in advance!

Couldn't Figure out a P0405 code, but then...
 

I recently bought a 2002 4.6 4x4 essentially sight unseen. I brought my code reader and saw it was throwing a P0405 code (EGR circuit low). I knew this was common and easy to fix, so I went through with the purchase. I took it home and peeked under the hood to find a new EGR sensor already in place! This wasn't good, I thought. I checked fuses, and cleaned out the throttle body, but nothing was getting rid of the code! Then a thought stuck me. I looked back at the new sensor, and took double take. The previous owner installed it backwards!!! I popped it off, and put it on the other way. Truck has been running fine ever since!!!

Hahaha that's pretty good.

Damn i just posted asking bout this very topic! But are you positive just see this in haynes manual cuz i have boughyt two and neither shoed 10000 resistance. Perhaps im going wrong swomewhere? Aqny thoughts or advice?

Awesome info and pics. Thank u

I saw only two statements.
1) my truck has a heated pcv
2) but the cost difference is astounding. $85 vs $4 for a non-heated pcv.

So, Brew must be pointing to one of these being in error.
He helps a lot, but sometimes, he... Is like this. My Sr badge only means, I have been here a few years. Check your $20 Chilton/Haynes shop manual, or ask O'Reilly's, or something. He probably read a lot in his earlier days, and expects others to also pay our dues. Let us know, please. If you do this and get stymied, some of us who also don't know will try to dig. We are not loafing but have our own projects.

​​​​​EDIT; I'm old school, so these modern tenth gens are new to me. I cannot fathom a heated PCV, but I'll try to dig tomorrow.

Nice

:rolleyes:

EDIT: They look too different to swap in or out.

My '01 has no heated PCV valve,.but your 2003 might..$90 and is a hose octopus of sorts, as well as a $3 unheated valve.

So I fail on both points I saw.
Heated might be and $85 might be.

Googling this also brought up pictures and how-to-locate.
Look for it. The heated type must be obvious.
Look here,.item 2/2.

https://www.oreillyauto.com/detail/c/standard-ignition/engine-sensors---emissions/pcv/pcv-valve/c24c7c440178/standard-ignition-pcv-valve/std0/oft101

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egr p0402
 

03 4.6 v8 code p0402 my vacuum tube on the top of the egr valve is pulling a vacuum when idling i replaced the dpfe sensor and the vacuum solenoid and its still pulling the vacuum could it be the egr. tube that runs to the exhaust can you test the tube for a clog. i have seen on u tube that the dpfe sensor could not be communicating with the pcm

I haven't heard of them clogging, leaking yes. Tube leak or popet valve malfunction is a 402..check Scorpio here, -

https://www.fordscorpio.co.uk/egrmonitor.htm

EDIT: Scroll past PO402 in red print...keep going to the diagram with 402 displayed, then read below that. The diagram shows the popet as well.