Three Most Common Causes of P0401 on Fords
Vložit
- čas přidán 6. 08. 2024
- In this video I'll share, by my experience, what has been the three most common causes of P0401 on Ford vehicles with a DPFE EGR system. The definition of P0401is "Exhaust Gas Recirculation flow insufficient". Its been my experience that this code is usually caused by a faulty DPFE sensor, clogged EGR ports in the intake, or damaged hoses going to the DPFE sensor.
Note: This video is not meant to be used for diagnostic purposes. I'm just sharing my experience about what has been the top 3 causes of this code on Ford vehicles with this EGR set up.
Let me know if you have questions. I'll be happy to help you with more information.
DISCLAIMER
Barbour's Auto Help is not responsible for any damage or personal injury incurred in the process of performing any auto repairs done by you the viewer. Automotive repair is extremely dangerous. Repair your vehicle at your own risk. It is the viewers responsibility to verify all information and procedures as outlined in YOUR REPAIR MANUAL AND OWNERS MANUAL FOR YOUR VEHICLE. Owning and using a repair manual suited for your vehicle is essential for correctly and safely performing ANY repair to your vehicle. Always wear safety glasses and heed all instructions for use applicable to any piece of equipment you may use. Due to circumstances out of the control of Barbours Auto Help, Barbours Auto Help makes no guaranty that by the use of the information given in this video a quality repair will be made. Barbour'sAutoHelp makes no guaranty that the information provided is totally complete, syncronized and accurate. Verify everything using an appropriate repair manual. You can do it. Do it right and do it safely.
Repair your vehicle at your own risk! Barbour's auto help does not guaranty a proper repair using these techniques.
The use and distribution of any materials provided by Barbour's Auto Help is strictly prohibited outside the CZcams platform unless written permission has been provided. This includes embedded videos on websites other than CZcams.
Music by:
Zombie Rock by Audionautix is licensed under a Creative Commons Attribution license (creativecommons.org/licenses/...)
Artist: audionautix.com - Auta a dopravní prostředky
Thank you you are the only one with the correct answer and to the point
I found the valve to exhaust manifold pipe leaking at the seams where they put the flex section between two steel pipes on a 1996 5.8 throwing a P1400.
EXACTLY what I need to get started. Thank you so much!
No problem.
dude you saved my day..thank very much for this video.. you completly solved my problem..cheers
Very well explain and helpful. Thanks
No problem
I've got a 01 ford f150 with the 4.2v6 and I've probably changed the DPFE twice on it. My engine will start "pinging" and changing that sensor out stops it. Thanks for the upload!
+arciefan Thanks for the info.
Yes sir. I can't take credit as I found that solution for the ping on an auto forum somewhere. No promises of course, but was lucky and worked for me and is not terrible expensive part on mine. Think it was less than 30 dollars on my truck.
Amazing how you got me to take my EGR valve off of my truck and blow it out and clean it up with carburetor cleaner and what have you and have that code go away bless you God bless you you’re awesome thank you
Thank you very much for this video. Ford Explorer 2008 4.0 Where is the DPFE sensor located?
Verry helpful video..gives me a ideal of where to start and I can understand you clearly. Thank you.
Glad to help!
Thanks buddy. My mother's Sport Trac has this code. I deleted it and drove it for a while and it didn't come back. Hoping it stays off as she's a total hypochondriac about her vehicles.
Have had P0401 code for about a year, really want to get rid of the service engine light so about a year ago i changed the DPFE sensor but not with a oem one I’ve been hearing that if you don’t use an oem one might not read it right ? I also bout 8 months ago cleaned the throttle body but only from the intake on top, could it be that I need to take it entirely off and clean it all ? Or should I just replace the egr valve itself sitting at 150K miles 2003 f-150 5.4L
I have a Ford Taurus 2006 and it hard to check engine light come on and I just got an oil change and it was showing me low oil pressure light constantly coming on when I stopped and I took it for a diagnostic check and this is the code that came up
Good job thank you
This was super informative. Tackling this today and will report what fixes it. Thanks!
Right on.
did you figure out what it was? my code just came up after cutting off my mufflers
Still waiting on that report
@@Rabbit.760 legend has it hes still working on it
I know this is an old video but I saw that his ford truck has what looks to be a hose connected to the egr valve, is that supposed to be there on all cars? I have a 1998 Ford Explorer v6 and there's nothing on top like that. Thanks in advance
good video no nonsense👍
02 explorer 4.0 sohc here. Changed dpfe sensor 2x along with the connector, new egr valve, new Egr solenoid, took the line off the exhaust and cleaned it with a wire brush and throttle body cleaner, cleaned the port inside the intake manifold, and same code keeps popping up!!!!
same here. Everything is new oem motorsport I think I have an exhaust leak in cylinder #2 after repairing a spark plug ejection. when they retapped the threads it caused a whistling noise during accelleration. But I also have a bypassed vacuum canister that might be contributing to the problem
Have you had a cat converter starting to plug up cause the hoses to burn up at DPFE sensor? Seen it once awhile back when I was a Chrysler Tech. Great info and video. You packed great info and less than 5 minutes. Thanks!
Anytime I've seen hoses burnt going to the DPFE they were usually the wrong type of hose. The correct hose is made of a special rubber that resists burning. I suppose it could be possible that a clogged cat would cause that though. It makes sense to me anyway. Exhaust temperatures in that are would be higher.
@@BarboursAutoHelp yes u r correct. The hoses are different than regular rubber fuel hose. Most are silicone i think.
Exactly what happened to me, clogged cats caused mine to melt
Very helpful
Glad to hear that
I have this code and already replaced the egr valve but it popped up again what should I do next?
I have a 1999 ford Taurus 3.0. I changed the sensor but now getting the po401. could I just use some sea foam to clean out any possible gunk in the system and see if that works
Have you watched the other video linked in the description? This may be what is causing your problem. The video explains a little more on what to do.
Thanks it helped me..
Glad to hear that
I have both 401 and 443. Is bad PCM can be the problem?
Does a 2009 Explorer 4.0 even have a DPFE ? Cause Im getting a PO401 & 402 with a bad idle and I cant fix it.
i got a 98 f150 4.6 with a code p1299 and p0401..for the p1299 code ive replaced coolant temp sender and the cylinder head temp sensor but now i have a hole that just magically appeared on my rusted exhaust manifold🤔 im just wondering could this hole on my manifold cause p0401 and could it also be the cause of the ltfts on both banks to read very rich at about -19?...also p1299 reappeared any suggestion would be very helpful
I'd say the exhaust leak probably is affecting your fuel trim. P0401 is most likely not caused by the exhaust leak. I'd suspect the DPFE sensor or clogged EGR ports. P1299 sets if the vehicle is over heating. A bad CHT sensor could cause that code but it's more likely that the vehicle is actually overheating. You'll need to figure out if it is actually overheating and why. Hope that at least gets you pointed in the right direction.
How much do mechanics charge usually to fix this?
Well locks ok. But firs must check all evac hoses for leaks.before all .
What does it mean if it says input is high under the p1401 code?
Is the egr valve stuck open?
Thanks
Thank you
You're welcome
I have a 03 crown victoria, 4.6 2v. Yesterday i developed a bad hesitation and breakup. I changed the coils, plugs, fuel filter, and cleaned my maf, and cleaned the "charcoal canister" underneath the tank. Its still doing it. Any ideas? I did the egr test where you stick your finger over the hole where the foam protector was and it didn't die, just ran very rough
Whats your fuel pressure while its happening? Also, do you have any codes?
@@BarboursAutoHelp it had no codes. Went back and checked my coils again. Turns out 2 coils were hitting inconsistently. Contacted seller and for 2 more. No issues since!
I have a 2000 Lincoln navigator with the same code when the engine is cold it hesitates between 1000 and 1500 RPMs when you rev it up between 2000 and 3000 it has a miss sometimes it stays sometimes it goes away any suggestions
Its possible you have two problems. Tackle one at a time. I don't believe this code on that vehicle will cause any noticeable engine performance issues.
Check all vacuum hoses.
i just got this code after i removed the mufflers off my car.. would that by any chance have an effect with this code?
Not something I see every day. I suppose it could reduce back pressure a bit. I really dont know.
I’ve put both an egr valve and the sensor for it and the code still pops up it makes no sense
If it runs slightly rough could it still be the sensor
@Manny I cleaned my throttle body, mass air flow sensor, egr valve, changed air filter and code went away
i have an 04 explorer that is dying every few days on short drives , its throwing this code po401 & po193 fuel rail pressure somthing, im lost this helps a bunch, thanks also if you read this could you give any tips about the po193?
Fuel pump
I have a 2006 explorer and had the same issue, engine light on, code p0401 and car would just die after 15min of driving. It would start after few moments and drive normal but then again would turn off at the first signal light. I changed every possible related part like egr valve, pcv valve, O2 sensors, evap purge valve and even the cats. Nothing worked, still same code and cars switching off after some driving. Turned out it was the whole ECU unit!! Paid the refurbished one from eBay 250USD and boom!! Car now drives like a charm!!
What does it mean when your truck acts like it had bad gas the check engine is not on
Well... it could mean you have bad gas and that caused the check engine light to come on.....or one of a thousand other things.
Oh ya,that's the ticket, when I activate EGR valve at idle engine bigs for a second, my understanding it should die. To me acting like low gas flow, so ill net a dime to a dollar intake potrts,clogged, in check in morning and let ya all know if that was the problem, thanks any thing on purge valve, hold,vacume has 12v I do not have scan tool to send ground to the valve, have a po443 code valve circuit, any way to check out problem without scan tool command?
Sorry don't have a video on that.
i had this code for a few weeks on my 1999 expedition 5.4, unhooked the battery for 5 minutes and the check engine light quit showing, it wasn't driving weird at all
Was probably just a bit of carbon build up that tripped it one time and the rest cleared the light
@@Vidar93 yeah I blew a sparkplug in it probably a month after this comment now I have a 2006 expedition
@@danielpierce618 what caused that?
@@junkyardchronicles1289 the code or spark plug blowing up
My mother had this code in her 2000 Sport Trac. I used an obd2 reader to clear the CEL. Hoping it stays away. Truck otherwise drives just fine.
I have a 2001 3.8 L v6 and I’m getting the p0401 Egr insufficient code along with bad engine sputtering, lack of power, bucking, and stalling. Do you have any idea what this could be I’ve swapped many things and still can’t find the issue.
I have the same issue but on a 96 4.0. Did you ever figure this out ?
Yes it was my coil pack. And a dirty egr valve.
Where is the EGR temperature sensor for a Ford 4.6 ??? I can not seem to find it ??;
There is a such thing as an EGR temperature sensor on a Ford 4.6L? What vehicle is that in?
Yeah my rubber hoses keep getting blown off dpf sensor 🎉
I have a 2001 ford f150 and I changed out the DPFE sensor and EGR valve. still have same issue and P0401 code still active. Hoses are good. Any ideas?
What size engine
@@BarboursAutoHelp 5.4L
Have you checked to see if the EGR ports are clogged?
Would this make the exhaust smell like it's burning rich?
Yes it would.
Show us how to delete the egr completely, with how to hook everything back to where the car or truck runs good. Not concerned with check engine light.
Good idea for a video. Not sure when I'll be able to do that.
1998 ford econolime150 P0401 changed egr and changed the dpfe and changed evr im also getting P0303! got any suggestions
What size engine does it have?
@@BarboursAutoHelp 4.2
@@BarboursAutoHelp still trying to fix it
P0303= #3 cylinder has a problem, check plug, wire, fuel injector, and compression , if you can.
@@junkyardjedi7706 P0303 is a cylinder 3 misfire
Yo what’s up my dude idk if your still active or not but I have a question. So I got that code replaced the EGR thing your 2nd option and it still has the code right. Okay so when I drive it. When I cruise at about 45-50 or so sometimes slower it humps like it stutters a lot when I press the gas softly. But if I press it hard it goes fine no problem. Also idles perfect sounds fine.
My guy! What vehicle are we working on?
@@BarboursAutoHelp a 1999 for crown Vic LX 4.6 lt v8 quite a machine if you ask me xD
Usually a studder when under light acceleration at that speed, especially when going up hills, is indicative of an ignition misfire. It's possible you need plugs. But as for the code, have you checked to make sure the ports aren't clogged up?
May need coils and wires too.
@@BarboursAutoHelp no tbh I’m not a Mech savy person. I know the basics but not much. I thought about that but if I had a missfire it would cause a check engine light no?
Will a bad purge valve cause this ?
A bad purge valve will not cause P0401.
Hi i have a 00 Mustang gt and the hoses on the dpfe pop out and get super hot. What might be causing the problem? I'll be replacing the egr valve, dpfe, and the regulator
I'd replace the hoses when you replace everything else. Now those hoses are special. They are designed to withstand high temps. So be sure you get hoses designed for use on a DPFE sensor. It is normal for those hoses to get hot.
@@BarboursAutoHelp What do you think is causing the hoses to pop out off the dpfe when i accelerate?
It may be that the hoses are bad. You also may have too much back pressure. I've seen hoses to be the more likely cause.
Could also be something that I'm not aware of. So, it never hurts to have a hands on tech take a look.
@@BarboursAutoHelp im thinking it might be a clogged catalytic converter. How do i test that? I have a 2000 mustang gt staight piped
My 98 f150 was stalling and I had to floor the pedal to move it forward . I got code P0401. Is this the issue? I had codes P102 and P455 as well that I’ll look into, but does Anyone know if this is why a truck would turn off? Is this piece that vital?
No, I don't think the EGR system is causing the truck to stall. I'd be more concerned with the p0102. You may have a problem with the MAF sensor. This will cause the vehicle to run very poorly. Usually a dirty sensor is the cause.
Barbour's Auto Help I will look into that tomorrow first thing. It’s not a hard fix. Thank you so much for replying at this time. Stay safe 👍
Barbour's Auto Help I did and it worked thanks......
@@jorgemartinbg What did you end up doin?
Barbour's Auto Help it was no longer stalling or shaking, it ran back to the way it was.
i have them some codes on my 2003 ford F-150 4.6L engine an will it cause the engine to not wanting to start up
P0401??
I have p0401 and p0406 I did gut my cars cause they where clogged up, could this cause it?😄
Please re read the question you asked. Is that the question you meant to ask?
I replaced the DPFE sensor, the EGR vacuum regulator solenoid, and the egr valve on my 2000 Ford Ranger 2.5L and I still get a code 0P0401... Comment, please. Thanks!
It's quite possible that the egr port in the intake is clogged. If you where to apply vacuum to the egr valve while the engine is running does the engine want to die out on you? If not, and the egr valve is actually opening then your port is probably clogged.
@@BarboursAutoHelp Thanks! I will check that out. What I find strange is that there is no hesitation on acceleration nor rough idling while driving, but the check engine light on just drives me nuts... I appreciate your suggestion! Thanks, again.
@@hiramgarcia-memyguitar5521 Just FYI I am in the middle of making a video on how to check for clogged ports. May launch it by Tuesday or Wednesday.
@@BarboursAutoHelp... Thanks! I'm looking forward to it.
Here is a link to that video. It will be public Wednesday morning. czcams.com/video/qgkYR2On4E4/video.html and here is a link to another video I did several years ago that may help you further. czcams.com/video/NEavSgerbGg/video.html
Oh my go would some one please tell me what the hell is that little hose on top of the egr valve
That’s the hose that delivers vacuum to the EGR valve diaphragm. When vacuum is applied the EGR valve opens allowing exhaust to enter the intake.
@BarboursAutoHelp what is it called tho I need to replace it
Different parts stores may use different terminology. Just tell the where it goes.
@BarboursAutoHelp okays thank you
Could the air intake cause a problem In the emissions system?
What do you mean in particular? Could it cause a P0401?
👍👍
Does the crown Victoria have the dpfe sensor? I can't seem to find mine (kinda new to cars)
What year is it?
2005 CVPI
I believe its right next to the EGR valve. It should have two small rubber hoses going to it.
i sthere another name for DPFE sensor?
Egr flow sensor
Feedback pressure sensor
My OBD2 said it was the sensor for the code .
Ok
BarboursAutoHelp but it was wrong haha . I still have the same code on , P0401 code . At low acceleration it hesitates .
What are you working on?
BarboursAutoHelp on a 1999 Ford expedition 5.4L
Have you applied vacuum to the EGR valve while its idling. The idle should drop. If it doesn't drop or shut the engine down then your ports are probably clogged. Or the valve isn't opening.
I wonder does the guy doing the video know that there is a coil wire disconnected .....coil near the bottom of the screen by the big bent hose
Yes, I am aware. There are a bunch of things disconnected on this vehicle as it is in a "you pull it" junk yard. Just sharing info about the code. Not my vehicle and I wasn't working on it.
Can I drive when this pop's out
Would gutted cats cause p0401?
I wouldn't think so.
I got a 2000 Ford F-150 and the code reads “ exhaust gas recirculation flow insufficient detected”
I have that too on my '97. That is the code he's talking about here (P0401). Hoping one of these three will fix it for us both!
Just got that on my dad's 2004 ford expedition..... But my obd2 is red lighting cat and evap
Done all that still doesnt work hit a bump im the road it went off then 15 min later it came back on going into the smog shop driveway smh i give up wtf is it then? Cause i already did all this already within the first day fix the transmission transfer case power steering vacuum systems valve adjustments fan clutch in 1 week but this b.s. wont go away.
Are the egr ports clean?
All new the vacuum lines the sensor the valve the metal line that snap off
Heard that it should have engine off hi beams on then disconnect both battery ends for 24 hrs and try it again the memory and pcm have stored memory issues that dont let go
Its not my truck but its setting here in my drive way by tow truck at first now its 95% done all codes fix/cleared but this on and navi point direction but was broken before i work on funny when i hit the bump i swear to god 20 yrs of not working that indicates north south etc was on when the check engine went off. But heres something nothing in the booklet or diagrams say anything about this unit at all it was a special trail edition 4x4 one ownership
Ok did you answer my question? Also..... wut?
Heater core bypass, lol.
Gotta do what ya gotta do. I've done it.
9
Is that German for no?
Not on the 2009 it’s a whole different ball game I hate these damn newer cars they are built like crap
Thats what i have and I dont know if my 09 Explorer even has that. DPFE ? I bought a new EGR Valve but still getting 401 and 402
terrible video