97 F150 EGR question
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Lead Driver
Joined: Sep 2010
Posts: 7,005
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97 F150 EGR question
Has a P0401 code EGR unSufficient flow. Ive read several things that it could be, from a DPFE sensor to the EGR valve it's self our that the port going into the TB could be plugged. Truck drives fine does not have a miss or anything noticeable when driving other than the CEL, trucks a 4.6 with 200k on it, any pointers on what is normally the fix on this is greatly appreciated
EDIT: Forgot to mention it sometimes gets a P0455 code but i assumed that is gas cap. or could it be related?
EDIT: Forgot to mention it sometimes gets a P0455 code but i assumed that is gas cap. or could it be related?
Laughing Gas
Joined: Mar 2002
Posts: 1,060
Likes: 12
From: arizona
I have cleaned my egr valve many times and around 300k I finally replaced it but you should be able to remove it and clean it very easy.
If I was you and it has never been cleaned I would replace it. You can betcha it's clogged.
If I was you and it has never been cleaned I would replace it. You can betcha it's clogged.
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Easy test for port blockage is to apply a small amount of vacuum to the EGR with the motor running.
If the motor begins to run rough or stall, the ports are open.
Then you look to the DPFE be faulty.
Remember it's a low flow code. If the DPFE can't read the pressure it can't be seen by the computer for either a blockage or faulty DPFE.
Good luck.
If the motor begins to run rough or stall, the ports are open.
Then you look to the DPFE be faulty.
Remember it's a low flow code. If the DPFE can't read the pressure it can't be seen by the computer for either a blockage or faulty DPFE.
Good luck.
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Lead Driver
Joined: Sep 2010
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10-4....
new game... NAME THAT CANISTER....
Not sure if it would have anything to do with my EGR issue as the EGR code popped after the wreck, but that canister was cracked during the wreck and it has vacuum lines going to it.
new game... NAME THAT CANISTER....
Not sure if it would have anything to do with my EGR issue as the EGR code popped after the wreck, but that canister was cracked during the wreck and it has vacuum lines going to it.
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Vacuum reservoir. Fix it first as it may cause the EVR solenoid to operate incorrectly and apply insufficient vacuum to the EGR valve.
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Lead Driver
Joined: Sep 2010
Posts: 7,005
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I just fixed the crack in it, hope that does fix it. Makes sense being the code poped the next day after the wreck. wont know tell i get the fender back on and it just got its first coat or primmer so thatll be a bit
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