Ford Ranger EGR Flow Trouble Code P0401 (DPFE fault)

Yes, another Ford EGR problem! This one shows some of the same procedures as my other Ford EGR videos (listed below) but there is a little more attention given to the DPFE sensor in this one.
Engine Performance Diagnostics chapter 24
Symptoms
- check engine light (P0401) EGR Insufficient Flow Detected
Fix
- replace faulty DPFE sensor
Tests shown
- how to test for proper EGR flow
- how to test the EGR valve itself
- how to verify vacuum supply from the EVR solenoid to the EGR valve
- how to manually open an EGR valve regulator solenoid (EVR)
- how to test the delta pressure feedback sensor (DPFE)
- how to verify wiring integrity
Tools used
- scan tool
- labscope
- backprobing pins
- digital multimeter (may be used in place of lab scope)
Playlist
- (Chapter 24) EGR Flow and System Tests
• (Chapter 24) EGR Flow ...
Related videos
- How to test an EGR DPFE sensor (EGR flow test) - Ford, Lincoln, Mercury • P0405 EGR Sensor A Cir...
- 2000 Ford Focus EGR System Tests (EGR, DPFE, EVR) - P1409
• 2000 Ford Focus EGR Sy...
- How to test for proper EGR flow (restricted intake passage) - Ford • How to test for proper...
- Ford EGR Flow Testing (P0401, P0402, P0405)
• Ford EGR Flow Testing ...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdan... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

[@user-uj1xg7hb2u]

You are a person not to forget in this Automotive industry interms of Auto Electrical Faults Diagnosis and Repairs. You are number One brother. And I'm assuring you that I can't be a Parts Changer Thanks Danner ❤❤❤❤❤

[@anselgretel1683]

first video i have come across with an engine that looks exactly like my 99 ranger damn 8 spark plugs. 159,000 miles and brake line busted, on the back end after i towed it to find out the MAF sensor was bad had a new one put in. now it runs like a top again but i am getting a p1400 code on my cheapo $15 reader i picked up. Damn nearly 20 years of worry free driving and now I have to learn to vehicle. Thank you for the vid.

[@apo4525]

My 2000 Ranger has the same engine and I'm currently dealing with a P0401 code (EGR insufficient flow) I replaced EGR valve and cleaned the IAC, throttle body, upper intake, changed fuel filter and it's still running rough off and on. I'm thinking it's the DPFE now, was good to see my engine on here since I can't find much online about it. I know what you're saying, I'm at 145,000 miles and it's been a really good engine for about 20 years. Oh, I also replaced the 8 plugs and wires, I'm becoming a mechanic again too

[@emmittberg8001]

Did you happen to have p1450 appear as well im thinking its the maf due to haveing a oil soaked knm air filter when i bought it. 250k miles 2.5,

[@silentjohn1347]

Thank you for this video, had purchased EGR Valve based on P0401 code using code reader at O'Reilly's. watched this then looked at DPFE sensor and the larger vacuum hose was off and split from the sensor shorting out and basically exploding on the one side. Returned EGR Valve, replaced DPFE and 98 Mazda B4000 is running great. Thanks again!!!!

[@ScannerDanner]

Silent John awesome, thanks for sharing. Just an FYI, these are not vacuum hoses, They attach to the EGR exhaust tube and carry exhaust gases. That is why they are made with different material than a regular vacuum hose. (too much heat)

[@irvbarth2069]

Great video! Extensive walk-through of the trouble shooting process. Gave us exactly what we needed to know.

[@ScannerDanner]

awesome!

[@ScannerDanner]

Watch my newest video "ScannerDanner eBook and Lecture Videos introduction" or go to my website a w w w . scannerdanner . c o m

[@ZiggyZeeBeatz]

Dude you may have just save me hundreds of dollars. I have been struggling with the egr system for awhile that is the last thing I would have thought to change.

[@ScannerDanner]

It is actually bleeding manifold vacuum to the atmosphere all the time. It is a minor, controlled, vacuum leak. If you smoke test an intake you will always have a small amount of smoke coming out of these and it is normal. So by plugging the atmos. port, you force the vacuum to the valve.

[@ScannerDanner]

No problem, thanks for the comment

[@guymanicone7921]

I had a P0401 on a Mazda 3 along with lean and misfire codes. I cleaned the EGR valve and it was quite dirty. Code came back. Once I found the vacuum leak causing the other codes, it cleared the EGR code also. Can you explain why?

[@reynolds3465]

great video. Some fine person decided that a 1995 Ford ranger 3.0L did not need the DPFE plug and cut it off. I purchased a new plug and have the ford wiring diagram to tell me where each wire goes. Problem is the plug I purchased does not have the pins marked as to which one is pin one. Any way you can tell me which one it is.

[@ScannerDanner]

Thanks friend. Going to Vegas June 23 for that convention. Should be fun

[@monster11082]

thanks for the video, it is a 2.5l i have the 1999, also this helps alot cuz i have this code pulling up origanlly my egr tube broke at the exhaust manifold and i had somebody weld it up it fixed it for a while and its still welded on but out of now where this code ran, i know my egr still works(vacuumn tested) im not sure if its my evr or its dpfe sensor, im going to school to be mechanic so my instructors always say if ur not sure use the internet again thanks

[@ScannerDanner]

low power and EGR codes. you need to check your exhaust backpressure next. I have two videos on doing this, with the newer one showing how to do it using the DPFE sensor hoses on a Ford

[@jonsingleton203]

nice videos i am an ASE cert. master tech and L1 certified but i only have six years in the field so i am still learning but i work around a bunch of parts changing morons that come too me to figure out everything they cant so i have no one too learn from i dont feel im using my scope too its full potiential and your video very helpfull and i plan too purchase your book and like that is real world technician freindly not drawn out engineering mumbo jumbo. thanks man

[@66faroutman]

94 ranger 2.3 L has no top end power , new plugs , wires , coils test good , found a missing hose on the dpfe , got a new dpfe and hoses but one of the hose connections on the egr pipe is much bigger than the hose , is it missing something and will this cause the no top end power issue ?

[@ScannerDanner]

just read this now sorry. did u fix it? what was the definition of the 332 code

[@ScannerDanner]

With an EGR code you may have a detonation problem and the PCM may reduce the timing advance a little. So this can affect gas mileage in theory. This would not be the cause of your momentary high idle speed on decel.

[@vernon8337]

great video good info, would of like to seen this test on the 2.5L, step by step done with a multimeter and hand vac for us that don't have a nice scan/scope tool

[@felplayvina]

For some reason this Honda some time stall when put reverse or running but it did not stall while I was checking it what I found oil in the spark plug, and little oil in the cam sensor but still good signal and crank signal too, code 420 only, can you give me an advice thank you..

[@SuperCarfix]

This is the first time I have ever seen a bad DPFE on FORD>LOL

[@felplayvina]

Hi Paul I do have a question for 97 Honda Odyssey, testing the EGR system when I ground the solenoid the van stall but when I put my finger on the vent no stall no change no NADA it's this can be a problem or just because is different car?

[@ScannerDanner]

No. well I guess in theory you could have a plugged EGR passage cause positive fuel trim numbers at part throttle cruise (when the EGR is supposed to be normally flowing) If the EGR is stuck open this causes severe NEGATIVE fuel trim numbers at idle speeds (rich conditions)

[@powayflores13]

Just got your book very help full

[@michaelpoulelis4752]

I got a 97 ranger,2.3l and hit idles rough and intermittent flashing CL light.If u apply vac to egr at idle, there's no change, plug solenoid, no change,could it be the egr is stuck open?

[@ScannerDanner]

Yes, that is one possibility but you would have a code for excessive EGR flow on that system. More likely is you have a plugged up intake passage and a low flow code for the EGR system that has NOTHING to do with your current problem.

[@adamgaffney6806]

You're talking about the DPFE? I'm replacing that and the EGR tomorrow. I just replaced the vacuum and clean the mass air flow sensor. Still chugging.

[@juanchavez9153]

Best video so far.

[@ScannerDanner]

this is definitely a problem. both hoses must be connected to that exhaust tube. There should be 2 ports about 2 inches apart from each other on that tube

[@Usmanthemecano]

I've watched a few of those particular videos but I've not seen my particular case. The design and setup on my dpfe is the same as this video. So I guess yes it's the signal wire. I back probed it and every time it read 5v. When I start the vehicle and actuate the EGR by putting my finger on the bleed as you showed the voltage actually decreased erratically. I've been getting the p1401 and kept clearing it and it keeps coming back. The motocraft dpfe is $60. There are cheaper out there. What's your suggestion?

[@adamgaffney6806]

I have a 2002 ranger and it's having that same problem. 4.0L 4WD. It started before I left for deployment in Feb. 2014. Would it be a big issue if it sat for awhile in storage since I noticed the problem? Possibly leading to other problems? It's mainly an idle issue and I found the Duralast valve online for like 40$. Should I get just the valve or should I go ahead and just replace the sensor as well? I've had it 3 years and had only one previous owner, not sure if he had the issue or not. Thanks for your time.

[@ScannerDanner]

The valve doesn't fail as much as the sensor, also plugged intake passages are a common problem. Thanks for your service!

[@eliasguadalupe9939]

[@davidbryant5875]

Got a 99 ranger 2.5 will start but immediately dies.. if u unplug the map sensor it runs but rough. Someone also changed the ecu from one from a junkyard.. same year truck but I’m thinking he probably didn’t have it programmed to the truck. Could that be my issue??? Thanks

[@ScannerDanner]

Had a 99 ranger kick my ass before. It was a flex fuel engine that was dropped into a non flex fuel truck. Injector flow rates are HUGELY different for engines that run E85. Food for thought.

[@davidgruen7423]

D in DPFE stands for differential, how does delta make sense?

[@ScannerDanner]

if energizing the solenoid opens the EGR then the vent plugging test not working means this is a different design solenoid and you cannot use it on this model.

[@robbyjones7631]

A P1000 means the battery may have been disconnected long enough to erase codes or you disconnected the battery for an extended time. Run the engine enough to recover codes.

[@donniejohnson7499]

awesome Paul Danner.

[@PopZILLA214]

I have a 2000 ford ranger and the code its showing is p1401 high input. How can i diagnose it. Ive been chasing this thing and its driving me nuts!

[@ScannerDanner]

What is the voltage reading on all three wires of the DPFE sensor? Key on engine off, backprobing with the connector plugged in and then unplugged. So I want 6 separate voltage numbers. Thanks! I can definitely help

[@MrJgonzalez2]

Bushougoma Its the design,by blocking the vent hole you force vacuum to the egr valve,as long as the vacuum lines aren't broken.

[@Migzc90]

i got a code p0402. how many volts should the DPFE sensor have on idle?

[@MrUnderEstimated]

Hello dan! Im amazed how you explain this video well! im having a rough idle and or misfire at random times that i cant pin point on my ford escape 3.0 v6 2004. However i curiously did covered the egr soleniod while running and it rough idled before then magic came upon it and fixed itself. I Hollowed the rear firewall cat converter cause it blown the connectors on my old pdfe sensor which is now brand new from motorcract. And i am now confused how blocking the top vacuum of the egr soleniod fixes the random misfire and rough idle with a brand new pdfe sensor:'( any help or recommentations?

[@ozoctuna9787]

Can it run with out the sensor connected?

[@katiechandler6796]

hey i have a 99 ford ranger po401 dpfe shows 4.99 volts all the time unplug it goes to 5.12 manually open the egr valve engine goes ruff and will stall where should i look next

[@ScannerDanner]

Sensor plugged in, make sure you check your sensor ground. It should be .1v or less. If it's good change the dpfe sensor

[@katiechandler6796]

ok ill lyk thanks

[@appraisal951]

Hello; I noticed that my EGR Pressure Sensor has a broken wire on the connector. Do you have a video showing the replacement of the connector and wiring?

[@ScannerDanner]

The video I just uploaded today shows how to repair a connector when the wire breaks right at it. kzbin.info/www/bejne/ZoDYnotvmNSph8U&lc=z120thngarvadxf3k23zj1cjsn35dfj2n

[@canokrd]

hi Im from PR I want to know if that sensor its damage the engine will run bad?

[@Tom.N]

Hey Paul, have you had any DPFE sensors stuck at close to 5v all the time? GND to the sensor is fine and i haven't checked if one passage is blocked yet but i was curious if stuck high is another common fault of DPFE sensors opposed to voltage low.

[@Madasin_Paine]

I connected a vacuum hose to the vac line that I disconnected from the vac booster on the 96 Ranger, and then used it to create vac on the small vac port of the DPFE, with engine running, and the voltage went up quickly to 4+ volts. Would this indicate my DPFE may be OK? When you suggested the test using a hand vacuum pump and key on, you didn't say to run engine, but Im assuming you would run it.

[@ScannerDanner]

Just needed the key on for my test, but I like yours! Yes you DPFE sensor is functioning as designed. Now check to see if the EGR stalls the motor. It should, or almost should. If it doesn't, we go after plugged passages

[@probegt75]

Excellent video man. You have some nice equipment there! Got a question...I'm getting a P0453 code on my 2000 Ranger 2.5. I unplugged the DPFE sensor and with a DMM I'm showing a steady 4.98 volts with KOEO which I think that is correct. But I noticed that one of the two hoses is only like 4 inches long and is not connected to anything. Is it supposed to just hang there? Could this be my problem? I can't see anywhere it would connect to. Any thoughts?

[@halleffect1]

Paul, do you ever check the 5V vref with the engine running? i think some people do that to check for alternator noise, etc.

[@todorgounev]

Hi Paul, I have the same question as Tom N below. The troubles on my 99 Explorer started with hesitation and skipping upon acceleration and a P0402 code. When I measured the DPFE signal, it was between 4-5 V with the engine off. I put a new DPFE sensor and tested the signal voltage - it was 1 V as it should be. Drove the car for a day, and it spit another code, this time P1401 (DPFE Sensor Circuit High). I measured the signal voltage again and it was stuck at 5V, just the same as the reference voltage (the ground was still at 0). Did my PCM fry the new DPFE sensor in one day, or maybe the PCM has issues. I did also test the voltages with unplugged harness and got 5, 0, 5V, respectively. BTW, the vehicle runs good now probably because with the CEL on and the 1401 code, the EGR system is disabled, and the EGR never opens.

[@halleffect1]

some people say bad diodes in alt can cause ripple noise and mess with your vref signal. i it doesn't apply for this example, but i would like to see an example where noise causes drive-ability problems. i guess you would have a charging problem, so that would lead you to the alt.

[@Jehu0309]

what is the program you are using to get the live data?

[@crissy7503]

I have a questions about my escape 2002 v6 120000 miles, hopefully you can give me and advice, my truck doesn't have much power, however the engine runs fine, it showed the code p0401 and replaced the DPFE Sensor, it didn't show much power, after that it showed p1406 replaced EGR Pipe cleared the code and didn't make any difference, and still shows the p1406, what should I check now? visually I checked the vacuum hoses and they look ok thanks in advance

[@TheStarforce2]

so if you got a check engine light and the code is for the egr, but I am not noticing any engine performance issues. Whats happens if I ignore it? Will it damage the engine? Could it be why my throttle sticks? (when I take my foot off the gas and the vehicle maintains speed/rpm for a short time, like cruise control, or accelerates slightly)

[@mohad1601]

Thanks for the valuable information

[@MrJgonzalez2]

Paul, would lean trouble codes also indicate a problem with the egr system????????

[@gabrieljuarezhernandez1588]

Tienes el diagrama de cómo van los cables No cuento con el arnés

[@murrmann7234]

What volt meter would you recommend for a somewhat diy guy.

[@ScannerDanner]

+murrmann7234 any voltmeter really, it doesn't matter for what we need it for most of the time. Just make sure it is a digital voltmeter. Analog meters should not be used for most computer system testing.

[@elenalyonsfan]

I've got the exact model as you've tested 98 Ranger 2.5L with probably 150,000 miles. First had a P0402. I usually replace egr vacuum solenoid and DPFE at the same time on these Fords even the local mechanics do the same. Now I've got the FORScan software and can read more PIDs than I know what to do with. Which ones do I need to check with engine running and engine off? But still I replaced EPR solenoid and got back a P0401 and P0402. Then I replaced the DPFE and it was running rough at idle. So I had an egr under warranty, replaced it, at the same time put my old DPFE on and it still runs rough with only a P0401. I thought the new DPFE sensor I got maybe no good. The intake port was clean and I replaced the hoses with new Dorman silicone hoses. However during all this I noticed my muffler baffles are blown out which had been for awhile but now they are just totally blown out and rattling. Could this cause the excessive rough idle even with the P0401 code? Or could the DPFE still be bad? It lopes really bad at idle now but at speeds it's fine. Doesn't the EGR system usually work mostly at idle?

[@randylee2549]

Did you check your Cat? Plugged?

[@IrnMaiden304]

Any way you could give me some info/advice on just about the same setup on a 94 explorer. This would be the 3rd time im changing this sensor, not sure if its a wiring issue or just horrible parts quality for my DPFE. Gives me code 332, i've tested the EGR itself by disconnecting the vaccum hose and placing another hose and sucking on it and it just about stalls out. going to pop the top on the EVR and check that, never thought of doing it so thanks. any insight is helpful

[@probegt75]

I got to looking after I posted my question and the hose that is hanging is the one that is towards the passenger side of truck and has a little metal fitting stuck in the hose and I can see where that fitting broke off the egr tube. Probably replace the egr tube or try brazing the fitting back on. Hope that cures my issue. Thank you for your reply.

[@chipcash]

HELP! 2003 2.3 Ford Ranger boggs down and sometimes idles rough. No codes.

[@ScannerDanner]

I don't have a crystal ball brother :-) What is fuel psi? How are your fuel trims? When does it bog down? All the time? How does it run at light throttle? How does it run at heavy throttle? What is the history of the truck? When did this start? etc etc. Help me help you.

[@chipcash]

Thanks for the response, I bought this truck that had been sitting for 2 + years. Told it had a blown head gasket. First I put a new fuel pump. Got it to start. Ran rough, bogged down upon loading. Had a thermostat code, replaced that. Went up to a local shop and he said try the clogged cat approach, that fixed it. Still wondering about the head gasket thing.

[@engamen87]

i learned alot from your videos

[@mikemartin2fst4u]

i have this prolem with my ranger I threw this code my mpgs went down should I change the egr

[@SteveRobReviews]

Fantastic !!

[@SCAMPL6]

Great info!

[@meiv8161]

Iv got a 96 2.3 ranger with a manual and I just did the test egr sencer took the cap off and it did the same so I guess I'll order a dpfe sencerer my machanice is a lier. Kool thank u👍

[@ScannerDanner]

Did your RPM drop and stall? Or almost stall?

[@meiv8161]

@@ScannerDanner yes it did both the first time it the rpm's dropped and the motor shook the second time the motor stalled and the third time I tested the hose at the egr and it's got good suchin to it to so dpfe sencer then. My machnice told me it's my cat and he kept it for over a month. So I stole it back today so thank u

[@ScannerDanner]

Just remember a plugged exhaust will alter the DPFE voltage levels. Are you dealing with a low power problem too or just this DPFE code?

[@meiv8161]

@@ScannerDanner I drove it my other machanice who is doing all the work on it he's been in business for 30years so we'll find out thank u

[@carll.freemanjr.9867]

Looks alot like my 96 ranger with a 2.3. I have this code and I'm hoping this helps.

[@UpcomingJedi]

What model of scanner is that?

[@ebayerr]

Got any videos on the 2003 Ranger 2.3L EGR valve trouble code testing?

[@ScannerDanner]

I have plenty of Ford EGR and DPFE sensor videos. They are all tested the same. Search DPFE as a keyword on my video list

[@ebayerr]

ScannerDanner Thanks!

[@noeflores7382]

Buddy what happen if you have 5 in the Signal wire

[@ScannerDanner]

Sensor plugged in or unplugged?

[@noeflores7382]

@@ScannerDanner plugged

[@noeflores7382]

This problem Drive me crazy for a couple months i been replace the sensor for oreally and autozone and stilll have this Codes p1400 and p1401 i hope can you help me to solved this problem thanks buddy

[@noeflores7382]

My truck is Ford f150 96 4.9 liters inline

[@ScannerDanner]

@@noeflores7382 what are the voltage readings on all three wires with it plugged in?

[@snakebite1307]

I've watched a few of your videos on ford rangers and they're great. Just wondering if this could be the same problem with a truck I'm thinking of buying. Owner says it runs great most of the time, but every once in awhile the motor will stall out and not restart until you let it sit for a few minutes. The engine acts like it has no compression or something but if you let it sit a few minutes it'll start up and run no problem. No over heating problems with the truck I've been told. Sounds like a .IAC but not. 2000 Ranger 4cyl One other thing. Coulld you please recomend a held held scanner tool that can read more than just basic trouble codes. I can't justify paying for Snap On or OMC live data tools. Thanks and keep the videos coming.

[@ScannerDanner]

No problem

[@kneedown4GOD]

as always good stuff bro!GOD bless ya!p.s.have you taken your trip to vegas yet?

[@ScannerDanner]

I will if they come my way. I just don't see many Euro cars.

[@ITBPhoneJock]

Much thanks for the video... my 98 ranger seems to be fallin apart... having head light problems, but this is another one that I need to deal with. You got any vids on how to track down headlight/electrical problems?

[@ahill007ny]

Hey Paul on the 3.0 engine for these Rangers what's the best tool to use when you have clogged EGR passages? I applied vacuum to the valve, no rough idle, and i can hear it open and close. I removed the valve and there was carbon but i suspect there's a-lot more. Any thoughts? Thanks

[@ScannerDanner]

Remove the throttle body bro. The passages run behind it. You'll see it as soon as you unbolt it. That's where they plug up on these fords

[@ahill007ny]

This one has the throttle body and intake as one unit :( Do you think im going to have to pull the intake?

[@ScannerDanner]

Can you take a picture of it and send it to me. Give me one of the egr location and the throttle body. You may be able to open the throttle plate and get the the passage behind it?

[@ScannerDanner]

Or fish a coat hanger into the intake passage of the egr (valve removed) and try to knock it out. Do it with the engine running so you know. Plug the exhaust port so you don't burn your hand

[@ScannerDanner]

Of course, just not for alternator testing reasons.

[@engamen87]

thanks alot pual

[@Usmanthemecano]

What if the top wire reads 5v with koeo?

[@ScannerDanner]

by "top wire" are you saying the signal wire? Make sure your ground is good, then replace the sensor if this is the case. I have other DPFE testing videos that may more closely match what you are describing. With an open in the sensor signal circuit, it is normal to see 5v on the signal wire on some systems. This is a bias voltage that is being sent down the signal circuit from the ECM.

[@Usmanthemecano]

ScannerDanner it constantly reads 5v with the connector plugged or without. I just put in a brand New motocraft dpfe15 and absolutely no change. What's the next step from this point? ECM? Btw I just bought a bidirectional scan tool but I will need time to learn how to use it thoroughly

[@ScannerDanner]

give me voltage readings on all three wires with the key on, with the sensor plugged in (back-probing) with voltmeter connected to battery negative. Do NOT replace the ECM!!!

[@Usmanthemecano]

ScannerDanner disregard the last reply. I wiggled the wires and there it was!! Harbor freight butt connector failed again.... I reattached the wire and koeo is now 0.6v...So im returning this new motocraft part lol Btw while I was test driving the vehicle the dpfe voltage never went past 1v is that normal? Rpm rose up to 2500 on the drive.

[@ScannerDanner]

Nice! During driving there are conditions that need to be met for the EGR valve to be commanded on. This is what you want to pay attention to. If the EGR valve is being commended on and your DPFE sensor voltage doesn't change, you have other problems.

[@Coach_Dustin_C]

How do you get the CAP OFF!? @2:00

[@ScannerDanner]

A 90 degree pick tool and most times you'll still break a tab or two off lol.

[@Coach_Dustin_C]

@@ScannerDanner I changed the DPFE sensor instead of prying it off. But the check engine light is still on...?

[@ScannerDanner]

@@Coach_Dustin_C need to do that test for flow buddy

[@elmavr]

My Ranger has that same ticking/air leaking sound same as the video took out the egr valve cleaned it out kept doing the same sound ima try the dpfe sensor

[@ScannerDanner]

You exhaust (cat) may be plugged if the DPFE hoses are blown off

[@elmavr]

@@ScannerDanner dpfe hoses are not blown off

[@elmavr]

@@ScannerDanner just changed the dpfe, same leaking sound, real quiet when idling only audible when accelerating

[@fredhandy2063]

Great stuff!

[@ScannerDanner]

+fred handy thanks Fred

[@buust1000hp]

Hi, Great videos! What does it mean if I have a P0402 and the DPFE voltage is 4.95 with key on engine off, and when the engine is idling?

[@buust1000hp]

This would be for a 1998 Ford Contour SVT.

[@ScannerDanner]

Is that what you're reading on scan data or a direct measurement at the sensor? We need to do some checks on the wiring before we condemn that sensor.

[@buust1000hp]

@@ScannerDanner both. Using Forscan and used a volt meter.

[@ScannerDanner]

@@buust1000hp can you give me a voltage testing on all 3 wires please

[@buust1000hp]

@@ScannerDanner will do!

[@1766Adrian]

P1614 tiggo chery?

[@MrJgonzalez2]

mountaindog0 Paul has an abs sensor video,you might want to check it out.

[@JB-qq3cp]

I'm being jerked around between a lousy Ford dealership and a local mechanic. I'm fairly handy when it comes to fixing things and I've done plenty of work on my own but I'm stumped. My engine is running lean and setting the check engine light. It's running lean on banks 1 and 2. The dealership said that it is because of 1) a leaky egr tube o-ring that needs to be replaced and 2) a leaky intake gasket that needs to be replaced. After them holding my truck for 10 days and not even calling or beginning any work on the thing I went and picked it up with the diagnosis above. The local mechanic says that my intake gasket is fine, and that my truck doesn't even have an EGR tube to begin with! He says it's just the O2 sensors that need to be replaced and my fuel filter. Says the engine is running fine now. I'm suspecting that I'll pick up the truck with the engine light off and drive it for 50-80 miles when the light will come back on due to the fact that the O2 sensors were probably fine since they were replaced in the last 4 years. Any thoughts?

[@ScannerDanner]

Jb Byrne no way for me to know. EGR tubes and intake gaskets are common but without seeing your car, I'm only guessing. In my experience when you have lean exhaust codes on both banks it is almost never the O2 sensors that are at fault. Also a plugged fuel filter would cause low power and fuel starvation problems and eventually ruin the fuel pump. Of course and set lean exhaust codes. But to know if a fuel filter is plugged, you don't just look at it and say "you need a fuel filter". I think the first guy sounds like he is more on it. Even if it doesn't have an EGR tube.

[@dzorba1]

ScannerDanner 1998 Ranger 3.0 been getting really bad gas mileage for a long time now. recently started running rough when im at 60 trying to accelerate to 70 or 75 mph jumps real hard up to 4000-5000rpm but doesnt seem to want to accelerate and kind of gets stuck at the higher rpm until i let off the gas. Now at idle it will shake a little and I'm hearing a lope with a light knock. Been having a p1309 code forever but never ran bad till now and now im getting p0171,p0174,p1131,p1137. Fuel filter was fine but changed before i did fuel pressure test was fine. changed pcv valve was plugged and stuck closed. and vacuum hose from oil filler neck to air cleaner hose was broke and i changed that. Did a smoke test yesterday and don't see any vacuum leaks. cleaned the maf and throttle body. Today i decided to readjust my cam synchronizer to 75 degree TDC. I can't figure out the problem. Do you think it could be the DPFE causing all those codes, it's about the only thing i haven't checked. I'm pretty certain it's not the maf because when i unplug it while it's running there is no change. Any ideas what it could be?

[@ScannerDannerPremium]

Chris Smith post this to my forum please. Thanks! www.scannerdanner.com

[@Diazlsx07]

Hey Danner, I am automotive technician for Nissan and I really enjoy your videos and I was wondering how can I go about purchasing your ebook?? thanks!

[@randylee2549]

Hi Scanner Danner, in PHX Arizona, and coming home from a Baby Girl's Birthday Party today and the check engine light came on, performance was still good, AC on and 95 Degrees outside, so the engine was hot. Took it to a parts store for scanning, with engine running, not shutting it off, it was a P0402 excessive flow EGR, what is typical with these 2.5's? It is a 2001. Just passed Emissions last month, now I have this ) LOL

[@ScannerDanner]

what you working on my friend, that would help :-) IF it is one of these Fords with the DPFE sensor there is a 99% probability that you have a bad sensor, but I've seen restricted cats be the initial cause too. It runs okay right?

[@randylee2549]

Sorry ScannerDanner , yes it is one of these fords, this particular one is a 2001 Ford Ranger with the 2.5 four cylinder auto (4 speed) super low mileage of 70000 miles.Since then, I disconnected the negative cable for 20 minutes and cleared codes that way, and so fat after doing a drive cycle it has not come back. When it triggered and set the light while driving home (just 9 blocks) it ran well, and runs as new now) Is it possible to be a possible slightly sticking EGR since if it was the DPFE it would have come back once I did a drive cycle right? Thanks!

[@ScannerDanner]

most likely still a failing DPFE sensor and not the EGR valve. I have a few other videos on this same system that will also help you identify and be sure of where your fault is when it comes back

[@randylee2549]

@@ScannerDanner 1 year later, and the P0402 is back, so after doing your test without the scantool but plugging off the port with fingers, egr is fine, time to get a new DPFE SENSOR, great video, 1 year recap😀

[@randylee2549]

Electronics haha

[@danieladams798]

What if my vehicle does die when I put my finger over it

[@ScannerDanner]

Then your EGR valve and passages are clear and you need yo focus on the DPFE sensor itself. What does the signal voltage do with no glow and full flow?

[@danieladams798]

@@ScannerDanner haven’t checked it yet but my dpfe mount is just hanging loos only thing hood it on is the hoses

[@danieladams798]

Now it revs up when I put my finger over it

[@CrawleySwampKennels]

What if it does not die when i put my finger over it

[@ScannerDanner]

Snap-On Verus

[@ScannerDanner]

yep :-)

[@1979jwm32]

Yup

[@ScannerDanner]

thank you very much Jon! if you want more info on my eBook fill out your info on my web page and I'll send you some stuff. thanks again

[@halleffect1]

IATN is your friend.

[@johnnymann4316]

cool

[@dejanira2]

hey my pick up at least the same model.

[@paulconner2722]

For those of us that aren’t mechanics, we could better understand this if you showed exacty WHAT it is you’re putting your finger on one minute into the video. Otherwise, the video is useless.

[@ScannerDanner]

I'm teaching to techs, I'm sorry. There is an EGR solenoid with a vent cap on top of it that you have to pry off to gain access to the vent port to plug it with your finger

[@ChasingPerfection]

He did show it later in the video. Maybe you shouldn't be working on your vehicle.

[@roro560v8]

dose the same test can be done on a Ford Taurus 03 v6 Eng. OHV, cause I think it got same sensor....!!!