Ford F-150 5.4L 3v Engine: Common Causes for Lean Codes P0171 P0174
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- Опубликовано: 4 май 2017
- Come along as we look into why this 2004 Ford F-150 is setting a P0174 Bank 2 lean.
These are the Tools and Parts Needed for this repair:
Latest Ford Mass Air Flow Sensor 2004-2014-
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CRC MAF Sensor Cleaner-
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Motorcraft Electrical Connector Grease-
amzn.to/2pfjVfD
Air Filter Tray Seal-
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My Company BSG Automotive offers Auto Repair services in the greater Chicagoland area.
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Disclaimer:
The information, demonstration and any content contained in this video is for informational purposes only. The user and BSG Automotive (hereinafter “FordTechMakuloco”) makes no warranty, express or implied, regarding the effectiveness or safety of the contents of this video. In no way should the contents of the video, including the tools used, be repeated or tried by anyone. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. FordTechMakuloco shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by FordTechMakuloco and therefore, FordTechMakuloco does not warrant that the video is unaltered or not modified. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Therefore, viewer agrees to release, waive, and discharge FordTechMakuloco or anyone affiliated with FordTechMakuloco, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law. 
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These are the Tools and Parts Needed for this repair:
Latest Ford Mass Air Flow Sensor 2004-2014-
amzn.to/2qy0K4I
CRC MAF Sensor Cleaner-
amzn.to/2qL1Bvq
Motorcraft Electrical Connector Grease-
amzn.to/2pfjVfD
Air Filter Tray Seal-
amzn.to/2pN4BdF
FordTechMakuloco do you have a diagnosed video for the early 2001 4.0 sohc Explorer for lean codes (bank 2 ) ?
Every video I watch makes me more informed and a better parts replacement tech !! Great stuff always.
FordTechMakuloco are there any videos on PCV lines replacement on older 2 valve 5.4 motors? I’m having a tough time with that elbow hose at the base of the rear intake manifold, it’s an expedition so the firewall makes it extremely tough to get back there and release hose clamp to pull off? Do you guys pull throttle body off to gain more access? Thanks bud.
What if the LTFTs dont move? They stay at 1.00 percent and STFTs are at .63 and bank 1 sensor 1 doesnt fluctuate lile bank 2 senaor 1. Its giving me a P2195 code. I "cleaned" the pcv and check engine light comes on much quicker than before
Thank you sir, for all of the time and effort you spend making these in-depth, educational and very helpful videos. I'm not a certified mechanic but I've been working on my own/my families vehicles for years thanks to you and others who take the time to teach guys like me how to properly work on and maintain their vehicles. Many blessings to you, and thanks again.
What a shame there aren't more techs around who actually know as much as you do and are willing to spend the time it takes to analyze and find the fault.
Most of the time most people drive around suffering issues in their car for years because top notch techs like you are so few and far between.
Good on ya mate.
My 5.4 3v has had the check engine light on for a few years now.
I just want to say that out of all the car repair video people on RUclips, in my opinion you are the best. Obviously you are a highly skilled professional with many years of experience. You make everything easy to understand and that makes all of us better mechanics. Thank you for all of the expert information. It is much appreciated. Keep up the good work.
The knowledge you pass on and the step by step is absolutely invaluable. Thank you
Want to say "Thank You" for all the videos you have produced! From an old guy that totally hates working on engines (but too cheap to pay ransom) my '04 5.4 3v runs a lot better because of you. And I'm not all stressed out! Your skills, knowledge, and personal demeanor are excellent. Best wishes and keep up the great work!
4 years later heavily needed this video. Helped get my 06 running great again
Excellent video on all levels, knowledge, teaching skills, editing etc. TYVM for taking the time to make these videos. You are helping a lot if people both in and out of the field.
Just bought an 07 Lincoln Mark LT I love this truck, but it has this nightmare 5.4 3V in it so that's how I found you! You are in that top 5 percent of all techs & mechanics I've ever worked with. I hope your a billionaire one day thank you far your time & work!
I got my 06 5.4 two years ago…. Thanks to this Godsent gentleman, I have been sorting myself out….Grateful for the help!
Dude you're a lifesaver. Loose evap hose on the rear of my engine was kicking my butt for days. Thank you so much for all your great videos. Will be donating to your channel.
help me please how how do I get to the back my hands don't reach behind it
@@willywonka077 its very difficult to get to unfortunately and it's all feel. Removing the brake booster might be your only option.
Had the same issue w/ my 95 ford windstar. Running lean & it was because of a dirty MAF sensor. Thank you for sharing & great video. Informative.
Thank you for this video! Was starting to scratch my head on a bank 1 sensor 2 code. Wound up just having to clean up the MAF sensor, read KOEO voltage and it was .03, cleaned it reset and and it's been good since!
Dude let me tell u..I've learned so much from u that I can take an engine apart, thanks to u.
You South Main auto Codys diagnostics and Pine Hollow diagnostics are the reason I am definitely a better Technician. You’re definitely a master in your trade. Thank you for sharing the knowledge.
I appreciate it brother!! Mine was reading P2195 and P2197 Lean. With a little starting fluid and not saying that was wise we found our rough idle spraying that vacuum in the rear of the engine you pointed out. we will look at the other to make sure. Man, thanks a ton! Keep on keeping on! We are broke out here! This helps us so much! Thanks again
And with the high inflation right now we are even more broke
I would like to thank you for your experience on working on these Fords. I had several code for Lean banks. I found out my vapor line had holes from a mouse/mice. I had remove the nest and replace the line. Since I am a truck driver, I don't use my pickup every day.
Definitely check the foam on the air filter box. I have a 2005 expedition 5.4 that wasn't pulling any codes (at least not to the point of tripping the check engine light), but I was getting atrocious gas mileage, as well as a drastic issue with power at times. When I would floor it, I would get almost bursts of power between bogged down acceleration. I also had the obnoxious diesel sound once warm at idle. I found that issue, cleaned off all old foam, and replaced with new padding. It solved all my issues, including (somehow) quieting down the engine.
I've been a mechanic for almost 25 years.. I wish I could have worked with you...
You mean you want him to diagnose all your jobs? 🙄
@@DoyleShadduckwhen you’re passionate about a trade, a great teacher and mentor is what you should desire.
You rock man. Most informative video series ive ever watched on the tube
You should call your channel the Ford 3valve repair network.
I know right.
Is it OK to tell you that I love you, bro? I just followed your 4 part series and you helped to add $8K to my truck's value. It's a Harley Davidson edition, sweetness now..you also helped me through these codes! That's more than my ex ever did for me...seriously, thank you from my heart and soul for equipping RUclips with your spot on videos, and from reading comments, your following will only grow. Peace out my friend.
what was the issue
Thank You - dirty Mass Flow Sensor and cracked vacuum hose on my 2005. All good now.
I hope you keep making videos as you have been a great help to further my diagnostic skills. I'm going on 3 years running my own repair garage near Milwaukee WI. Good man 👍
Thank you so much. I had a hard break pedal and rough idle after changing my f150 vct solenoid. Was at a lose until I came across this video.
Perfect Video and Perfect Timing! Bruddah as always - You and Your Videos Rock !!
Got a couple important questions for you.
1. How reliable are the "Re-man'd sensors"? And...
2. What companies would you recommend if we can't buy from OEM?
3. Which companies have you steered away from?
I have yet to hear any good things about Dorman electronics and of course their "exact fit parts" are already #1 on the Top 10 Don't Buy charts - unless you really, really have too. Even then -- "Buyer Beware".
The wife's 2007 toyota Camry has been giving us issues lately. Her XLT Camry was bought new in summer of 2007 and has been a trouble free car from day one. Now at over 100,000 miles it's asking for some normal and expected detailed, in-depth and attentive TLC. And she'll get it. Great Car.
Last week I was getting the same codes you spoke of in the video wrt the fuel trims and DTC's. Wife came home from work saying the "Check Engine is On". Using your past videos as a guide and my scan tool combined with my very limited skill sets - I was able to fix all of the issues by simply cleaning the MAF, the throttle plate and the K&N flat air filter.
Bruddah - I can say this - All is well in the islands. Happy Wife - Happy life and it's real time proof to the wife that (pounding my chest like Hercules) "Man needs to buy more tools!!" -- "Honey, buying that $400 scan tool just saved us a lot of money" and "this tool just paid for itself!" (cough - cough - ah - emm, honest it does ;))
Once Again Your Videos let me fix it right and saved us a boatload of money by not having to spend on things I didn't need to buy. Not to mention that I am able to better Interpret, Understand, and Utilize my scan tool. I was really worried that I'd have to buy a new MAF and/or TBS. That would of easily cost me over $500.
Toyota over here wants $198 for the MAF and a new Throttle Body (sensor included) is over $300. The TPS sensor isn't sold separately over here. I went to a friend who works at a Toyota dealership in the parts department and said the same thing "sorry bruddah - You have to buy the whole Throttle Body assembly".
They said it's because of the TPS and Body design. I Say - I smell a wolf in the hen house as I cough "Rip Off" out loud.
Any Howz -- Thanks Again Bruddah!!
You couldn't have posted this video at a better time! My 04 f150 is throwing P0171 and P0174 codes. I'm digging into it tomorrow to see what's going on. This video has probably cut my troubleshooting time in half. Thanks for always posting great videos!
What're you find?
What was the issue I'm having same codes but no symptoms of vaccum leak everything reads good I'm stumped🤔
What did you find? Same codes can’t find leak. Timing chain?
Thanks for the video. Perfect info as with all your videos. Ford dealer has no info on the upgraded vacuum elbow. Ordered the whole line $160. Hopefully the new one comes with a better elbow.
You are the most helpful i have found yet on these pain in the butt 5.4 man thanks for the help
They are work horses but Good grief they are a pain!!!
Thank you for making these helpful videos and sharing your knowledge.
Your knowledge is AMAZING Brian!
Thank u so much man I've learned a lot on these 5.4 3v motors thanks to u
Thank you so very much for all the useful i information. I even learned how to fix my gas dryer, from watching your videos.
As always I learn a lot from you and Eric o
53 thumbs down? I swear I'll never understand how people who clearly need the tips/tricks/education on this subject, take the time to watch your extremely helpful videos just to give them a thumbs down. Smh.
My only conclusion is that these are either low budget mechanics that are mad about you educating their would-be customers or simply just lost trolls. Take your pick. Subbed 4 life!!!
Or fat fingers
I got a million dollars! You can't fix mine! I think your by far the best Ford tech, but I have one that just can not be done.
your timing is probably off and need new timing components and phasers
@xcataclysmx I don't know if the man here himself knows or has ran into this... After days and days There is a very big difference in those spark plug numbers. I will say I discovered and I will also say that in the back of the intake where it meets the heads. We're leaking ever, so slightly. You could not notice a misfire, didn't really have any symptoms that you would think? Nothing like the brake cleaner trick. Nothing like that would work. Nothing made sense. Put a smoke machine on it. Nothing and then I got the idea well. Let's pressurize the smoke a little bit and then the smoke started rolling out of the back of the intake gaskets on both sides. It was slightly leaking and that was causing so many problems
Wish we had a guy like you here in Minnesota
awesome video man going thru all those things i can without scan tool to solve my problem. i only have one question why does the 05 have different valve covers and do they have to be removed to change pvc valve? thanks for all the help you have given me so far autoparts employee had me replacing the o2 sensors chasing it luckily i found this video first.
Glenn
SUPERB !! I enjoyed this video, even tho some of this is over my head ( reading live data, etc... ). I have heard that the difficult rear booster line firewall / bottom of the intake manifold leak can be accessed via taking the drivers side wheel off and reaching in thru that way? Do you know anything about this, Dr. Ford Guru ? Mine is a 2005 F-150 with 5.4L 2wd. Thanks. Excellent video by someone who knows what he is doing !!
How long of a test drive is needed to relearn the baro frequency? Any special procedure like WOT necessary to relearn?
Would that also apply to a 5.4 in a 2001 Expy Eddie Bauer? Do you need the scan tool for this repair or will disconnecting the battery re-set the trims? Thanks
I’ve got a 1997 f150 4x4 I replaced the PVC valve and hose but It still runs rough at a stop sign with a load on it what other vacuum leak could I have
Do you have A video of 4.6 two valve what are causes of lean code & vacuum leaks? I have A 06 f-150 stx 4.6
Been driving around with engine light on because mechanic said it was o2 sensor or cat converter. I had at cat changed that looked burned up and didn't fix it. After watching this video I started tracing vac hoses and found one collapsed and dry rotten. Seems to have fixed the issue so far.
So do you need to reprogram you ecu if you install a larger throttle body or just reset it by disc the battery? Thanks I have a 97 f150 with 4.6.
Awesome job. Keep doing it. (Thumbs Up).
Where are you located I’ve taken my motor apart and I had a broken guide replaced it and still have a tick after it’s driven I can let it sit and it will not tick after a cold start it has a code for running lean and did have a code when at WOT for a #8 misfire but since I took everything apart it hasn’t thrown a code for miss firing
Any chance you could provide a link to where I can buy the vacuum hose elbow with the clamps that you showed in this video? And thank you so much for your videos. Just finished the timing job and oil pump replacement and I could not have done it without your excellent 4-part series. I’ve been watching so many of your videos lately that my wife is starting to get jealous...
Hey boss my 08 expedition is straight piped and rear o2 sensors are not working...scanners only pulling up those sensors...when I'm doing 35 45 let off pedal and give it gas it jerks or misfires any clue?
Do you have any videos of you replacing the remote oil filter lines on a 98 f150 4.6?
hi I have a 1999 Ford Econoline e250 with the 4.2 ! did the water pump the other day now it won't start ! just turns over until I sprayed ether in the trottle body HELP
Great video, great info and very well done. Thanks
I tried to replace the cht sensor and the pigtail for it and now it's hissing and shaking any ideas I had that code as well
Thanks for this vido, keep up the good work and happy Thanksgiving
Hey, I replaced my Oil Temp Switch with a Motorcraft P/N SW5192 as recommended and the Engine light is still on. Advance Auto said it says the same problem on their readout. Any suggestions? Thanks
I was replacing the fuel injectors on my 06 ford f150 and the fuel line that connects to the fuel rail that oring blew off idk why bit it did when I fired the truck up in had gas everywhere and I can't seem to find that same exact oring anywhere the ford dealer sell the whole hose as one piece but i just need the oring that goes with cause I put other ones on it and it still doesn't work is that special oring or I just got the wrong one cause it ain't working
what would you suggest caused my lean code if the truck stalls when you spike the rpm it stalls out when you stop at a stop light
Bro i have question i got f150 96 4.9. 6 in line did you know how much pressure should be in the fuel pump
I'm throwing a code p2195 on my 2006 f150 5.4 3v... about a month ago, I took it in to advantage ford in Fremont ohio and had them replace my cam phasers and oil pump. they said that I would need a catalytic converter on the driver side here sometime soon. would that cause the code? I cleaned the MAF sensor, air intake and throttle body. I will be looking into changing a couple of the hoses mentioned in this video.. the reason I'm asking is because all the research I've done, it's usually more than just a single code for the vacuum leaks. please let me know at your earliest convenience. thanks
On my 2006 F150 5.5 3v I'm getting P0174, P0059 and P2197. Truck runs great warm, but rough at cold idle. Foam trim on air cleaner tray was gone so I replaced it but didn't do anything to clear memory yet. I've used oil k&n air filter for past few years and see oily film on outside of MAF. All vacuum lines appear sound on initial inspection, but not tested. Previously had IWE fail so I plugged the vacuum line to it for a couple months, but no codes until 10 months after vacuum to IWE reconnected. Any thoughts on cause of these 3 codes? Thanks!
Your videos are really outstanding. i never paid any attention to the bottom of the air filter as you described in your video so I inspected mine. Guess what mine was all falling apart as you have shown in the video so I order the tray seal. Upon receiving the seal the exact measurement of the seal width is 1 1/4 inches and the old foam was 1 inch so it had to be trimmed off to the exact width as needed. However the seal really sticks onto the housing just wanted to give a heads up so others will know what to expect. Although I don't have any error codes yet just trying to eliminate them before they occur. I am a firm believer of preventive maintenance. Can you tell us what the part numbers for the two hoses you described in your video in reference to the vapor feed hose and the brake booster hose to the bottom of the intake. I would like to replace both of them now before I have a problem. Many thanks, IMHO your the best videos out there.
Thank you so much for your video. My 04 expedition has these codes, and now I know what to look for. You have saved me thousands of dollars. Keep up the good work.
I was wondering if you had and info on reading live data on a 2006 5.4 88888 miles new motorcraft plugs and coils . I just am not getting the mpg I was getting
I own a 2003 Expy 5.4, I have a check engine soon light the guy I purchased it from says there is a vacuum leak. Same procedures apply on this engine and year.
Thanks for another awesome video. My P0171 and P0174 only appears immediately, when i stop the engine and restart it a few minutes later.
I don‘t know what to do.
Hey this has nothing to do with a LEAN code but i really need help on something for my 98 Ford EX. Getting the flashing OD light every now and then. Code reader saying Range sensor #3 shorted or low voltage. I checked with live data and all the range sensors say CLOSED except for #3 which says 0V. I thought the range sensor was all one piece. Any ideas?
Great videos keep up the good worke man.
Thanks!
Thank you very much, I thank you for explaining everything The way You do
would spraying seafoam in the intake set that code off for MAF sensors
Hey love your content. Please keep up on the content. Also do you have a part number for the brake booster updated hose?? Need that part for sure. Thank you.
The 2V engines also tend to show bank 2 lean first. I’m thinking it’s the intake manifold runner design. The way the air moves through the manifold.
Do you have a video on rich codes on both banks?? 07 navigator L is throwing a 1719 and stayin in first gear at times when cel is on, goes away after being cleared. changed the fuel pump, injectors, maf sensor, 02 sensors, coils, evap canister, ecu update, and cam position sensor (code came up once), no fuel pressure regulator on rail to change, starting to think its the throttle body?...truck is driving me loco...
p.s - when the truck has cleared codes its runs and drives flawlessly...big fan of your videos, any help would be great!
How about information about the PCV valves on these engines, kind of a different setup than the 2 valves. I have a 4.6 3 valve and apparently the PCV valve is part of the valve cover and can only be replaced by replacing the cover on the 3valve engines. Are they built like regular PCV valves, servicable etc. I have a small vacuum leak(I think) at idle that is pushing up long term fuel trims and wonder if the PCV valve in my 3 valve could be the culprit. Any way to test them, and how do they tend to fail? Thanks.
05 f150 5.4 hard starting hot. I replaced the temp sensor under the intake and the tje temp sensor in the upper oil pan. Did not make a difference. Any ideas?
I notice in the freeze frame data, the RPM was at about 1260 (ish) but MPH was 0, engine temp was 194F. I notice the truck did not have a high idle concern, and the RPMs were not high when doing the initial scan. My first thought was that the lean code was set after a harsh stop...only that is when an engine would be rich. I'm just curious, am I missing something here?
Okay so I was replacing driver side valve cover on a 2010 f150 5.4 had a bad pcv valve at least I think ..booster line in way of valve cover coming out, pulled it away heard a quick vacuum noise lasted about a few seconds .. when I was done completing the valve cover install fired up the truck and got a red brake check light.. felt pedal engaging brakes as I reversed put it in Park it stumbled and died ..it threw a check engine light that was for p2195 only ..reached my hand around back side of intake just like you said it had popped off when I was moving it out the way ..pushed back on problem solved thanks ford tech save my ass again..
My long term fuel trims are stuck at 30% and won't change could cause this?
very nice video, thanks
Any thing different for the two valve ? I have a 2001 and have had trouble with both lean bank codes and recently experienced a rough idol and rpms bouncing and occasionally wants to die at a stop
Hey guys,quick question this pertains to the 3.5 duratec v6 so obviously a different engine but this guy knows his stuff so I'd thought I'd ask,so I've heard the 3.5 can be prone to water pump failure ,and this can/will destroy the engine if this issue is severe enough my question is was this issue resolved?Have a 17 explorer duratec was hoping to keep it for a very long time,and I heard they reworked some mechanical components with the 16 refresh so was wondering if that issue was one of them.
What should be the reading for a 2002 explorer 4.6 maf grm/s and v reading thnks.
Muy buen video, mi f-250 5.4 lt 2005 tiene los codigos PO174, PO171, PO430 Y PO353, me pueden apoyar por donde empezar?
Hey thanks Makuloco
So how do you remove the rubber lines that are crumbling apart?
Love your intelligence and perception...I'm sendig e-mails to everyone i know to subscribe..you're great man...!!😊
what all should you check or replace if you have P013E and P2270 code?
My 2004 f150 5.4 3v is squealing like crazy sounds close to the trans . If I disconnect the vacuum on the left side that goes to the valve cover it stops the squealing instantly . Any advice on what that might be?!
What was the part number or name of the hose that had recall that behind the intake
Excellent content
I also have the 5.4L 3v and I checked my seal on my air filter door, after watching this video, and my seal is completely gone. What do you recommend to fix the door seal? I imagine they don't sell that seal at the auto parts store. Do we make one? If so, what material is best to use for the new seal? What thickness? Do you think this vortex could cause severe lean condition and rough idle and driveability issues?
Do the Newer MAF update the Baro the same way the Old one's Did ? You had to operate at WOT a few times before Baro would update. If I remember Correctly PCM only Looked at Baro at Start Up and a WOT event. If no WOT-- PCM operated at Baro reading for entire time engine was running. Baro was Altitude Compension Input to PCM. Is that still True ?
Can a cracked exhaust manifold cause one of these code errors? Po171, P0174
I replaced all my sensors for an 09 5.4 still have a P2270, P0054, P0141. Previous to that I had P0130, P0150, P2096, P2270. But now they are all for Bank 1 Sensor 2, Any insight?
Have the Same Issue P0171&P0174 in my 10 Silverado Really apréciate any Help thanks 👍
Will this cause a hesitation under load? I'm getting the same codes
I'm getting po340 and po344. Told by dealer and west elcajon auto and transmission that best bet is new engine for 2005 Lincoln navi, 5.4l 3v. Runs fine, don't want to by new vehicle. Any suggestions. I've changed cam phaser position sensors. didn't fix. They want big time money just to take apart to diagnose exact problem.
Have you ever covered oil dipstick tube replacement on a 5.4 in a Superduty? Mine has broken off at the pan.
I just did one on a 2003 F150 5.4. Was not a fun job. I had to unbolt the exhaust manifold from the block to get enough clearance to snake the new one in.
My mom's 1997 Fore Crown Vic showed lean codes P0171 and P0174. I cleaned the mass airflow sensor and the air intake but still got the codes. The problem was that the hose connecting to the PVC valve was loose. I tightened the connection and the codes went away.
Thank you it seems like this ford's have the same issues but somewhat easy fix after watching your videos but they give me a big headache
Hello I have an 2004 f150 with the 5.4 and have p0171 and p0174. I have smoke checked and found no leaks. Maf reading at idle is 3.9 grams. Short term fuel stays around 0. Long term is 20-30 on both banks. Checked fuel pressure on scanner at idle have 40psi. But on Manuel gage is around 29 to 30 psi. What would be my next step. Thank you
Would have been cool to see the test drive with the new MAF sensor. That way we could see the fuel trims at higher RPM's. Great video regardless. Very informative and helpful. Checked my filter door seal and it was completely gone. Giant gap for air to enter housing. Seams like the filter seal would stop that from vortexing the MAF sensor area, but I trust your expertise over mine. I think I will try duck tape first, if that works I'll be looking for that air filter door seal. If you know where to get one, let me know. The vortex in the air filter housing was good info. Are there other seals on that housing I should check? Can't tell unless I take it all apart. Didn't want to fix what isn't broken, even though I do that sometimes anyways. Great info, thanks for the tip lesson.