Causes of lean condition trouble codes P0171, P0174

Causes of lean condition trouble codes P0171, P0174 - GM 5 3L

Рет қаралды 989,454

Күн бұрын

The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1 and 2) a P0101 (MAF circuit out of range) and a P0300 (engine misfire detected). All of these were related to one single problem.
Engine Performance Diagnostics chapter 1 pages 4-12
Symptoms
- rough idle, especially cold
- check engine light (P0171, P0174, P0101, P0300)
- poor gas mileage
- hesitation on acceleration
- runs much better with engine warm
Fix
- replace intake manifold gasket
Tests shown
- how to use freeze frame data to determine type of lean condition
- how to interpret fuel trim data
- how to locate a vacuum leak with water
- how to smoke test and intake manifold
- how to know what trouble codes to fix first
Tools used
- scan tool
- smoke machine
- water bottle
Playlist
- (Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing
• (Chapters 4 and 5) Fue...
Related videos
- Understanding Short Term and Long Term Fuel Trim (an SD Premium video) • Understanding Short Te...
- How to find a vacuum leak with water
• How to find a vacuum l...
- Misfire caused by a vacuum leak
• Misfire caused by a va...
- Ford F-150 P0171 P0174 Trouble Codes - vacuum leak (water test) • Ford F-150 P0171 P0174...
- Idle Speed Problems P0507 caused by a vacuum leak
• P0507 Idle Speed Perfo...
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.scannerdanner.com/join-sc... 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.

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@roadkill5333 6 жыл бұрын

I love coming back and re-watching these videos, even after watching other vids, to see if I absorbed any of the info, and can process it in a real world scenario!! Plus, they are just entertaining to say the least!! I can't do much in the way of auto exchanges any longer, I was really into being "PARTS CHANGER", in my youth!! I did my own parts changing for my own vehicle, and some family and friends, but never knew how much I DIDNT KNOW, until MR. PAUL DANNER, and his real world hands on diagnostics approach!! Let me just say that I'm not a paid spokesman for the ScannerDanner teach-a-tech series, but....... I'm not against drawing in some royalties!!! :-D :-D :-D let me tell you where to send the check!!

@ScannerDanner 6 жыл бұрын

thanks so much my friend

@ScannerDanner 6 жыл бұрын

check is in the mail :-)

@roadkill5333 6 жыл бұрын

ScannerDanner!, headed to the mailbox, right now, to await its arrival!!! :-)

@KTHKUHNKK 5 жыл бұрын

roadkill5333 Tomorrow I will go to work on my PO174 code on my 2000 GMC Sierra 4.8

@rdvemo 5 жыл бұрын

@YouTube.TOM.A 4 жыл бұрын

I can never figure out how I can watch this video two years ago and look at it again today when I am much more informed, and still find a bunch of new information that I can learn from the tutorial. Thank you sir.

@jimbuford4147 8 жыл бұрын

Great video. I always like your willingness to go the extra mile to be 100% on diagnosis and help your viewers get the most out of your videos.

@paulmullins5425 5 жыл бұрын

Awesome video and I used to think these problems were so hard to troubleshoot but not anymore. Man you're a great teacher. Love how you break the problem down and make it simpler. Keep up the good work

@mikeoneill7360 7 жыл бұрын

I'm 52 years old and find this to be fascinating....You did a really nice explaining everything in this informative video, thanks.....

@ScannerDanner 7 жыл бұрын

Thanks so much Mike!

@davidcarney7555 3 жыл бұрын

@@ScannerDanner p

@michaelagalasso2389 8 жыл бұрын

Paul, Another great case study. I have two of these trucks. One with a 5.3 L and one with a 6.0 L this video will go into the archives. I always learn something new from you. Thanks

@homeehsan7007 4 жыл бұрын

Amazing piece of detailed information about fuel trims and lean condition. He has the quality of teaching those concepts to anyone. There are very few people who have knowledge and can convey to other people So SIMPLY IT IS BEST

@mikevonkleist6767 6 жыл бұрын

How long have been doing this? I've been at this for 37 years. You're one of the few people that knows what's up and why. You think like I do.You're a good tech, dude. Thank you from all of us.

@ScannerDanner 6 жыл бұрын

About 25 years and I've been teaching at a technical college for 17. Thanks so much!

@mikeoneill7360 Жыл бұрын

I’m watching this video again 6 years later from the last time, awesome….

@richardr5013 5 жыл бұрын

Much more than a mechanic, this guy is an engineer and has very in depth knowledge of internal combustion engines. When you can't figure out stuff, he's the man. Great job Paul, Thank You for your help

@AutoTechEngineeringDHAKarachi 3 жыл бұрын

this video was posted back in 2016, and still helping me. Great work

@Juise187 2 жыл бұрын

Subbed at the moment you demonstrated the water test. That was just genius. Your thorough knowledge and process is top notch. I will continue to watch what you have.

@ScannerDanner 2 жыл бұрын

Thank you and welcome!

@alexandergonzalez2232 7 жыл бұрын

Doctor scanner Danner! the word doctor means educator and one who studies complex in-balances in 5 different systems and makes a primary and secondary diagnosis. I keep repeating your videos in the hopes I catch one third of your 150%. God Bless and thanks for empowering the John does of the world.

@northernpatriot9078 4 жыл бұрын

rewatch : thank you!! the correlation between the fuel trims and the suspect intake leak was awesome and finding it with water once you showed that to the customer the job is sold

@wyattoneable 8 жыл бұрын

Good call on the fix and excellent visual with the smoke machine. Thank you for taking the time to show us that. This must be common because my 5.7 had such a bad leak water got into the engine.

@davesministry7789 8 жыл бұрын

Another excellent diagnosis job. So much better than grunt work part changing. I was surprised how much smoke leaked out with this small leak. Thank you..

@DG-america 4 жыл бұрын

Although I dont understand what you are reading on the screen during diagnostics, you did explain well enough for me to understand what you were getting at. I'm here bc of a 171, 174 code that occurred during load. At least the light was thrown after being parked at idle for an hour in the middle of a trip. Thank you very much for giving me a direction to go in.

@ScannerDanner 4 жыл бұрын

Yes sir. Toward the MAF or fuel pressure would be my top two for under load lean conditions

@zeej5003 6 ай бұрын

Danner! I just diagnosed a 2013 Chevy Express that P0174 and P0172 lean codes for both banks. (it ended up being a bad MAF). Fuel trims were normal at idle, but on acceleration the long term fuel trims would go lean at over +20%. I could also hear the engine knocking on acceleration with the doghouse removed. The engine also lacked power and the trans shifted poorly. You NAILED it at the end of the video with your comment about lean on acceleration is likely MAF or fuel pump. I spent hours today doing diagnosis. I finally tried a known good MAF and fuel trims went normal, power was back, no more knocking, and trans shifted properly. I learned to use a Snapon scan tool and scope from your videos 10 years ago. THANK YOU.

@ScannerDanner 6 ай бұрын

That's awesome, way to stick with it and nice find. Thank you!

@alansanchez-cp5lx 2 ай бұрын

What brand maf sensor did you get? I got local autozone but told to go to oreillys but don’t know of a particular brand if you could point in brand direction would help! I am having these issues but to the contrary my engine runs great when cold but when warm weather or engine warms up then i get the knocking or rattling on acceleration and sluggish acceleration and poor shifting… i already replaced fuel pump for different symptoms last year and maf sensor to tackle this p0171 but thinking of buying again this time from oreillys… any help would be appreciated

@zeej5003 2 ай бұрын

@@alansanchez-cp5lx OEM (A/C Delco)

@carylamari6546 5 жыл бұрын

Thanks, I was leaning toward a vacuum leak on my 06 Silverado 5.3 had a PO 171 code and your video confirmed it, I had a 17% Long term fuel trim and a 0-3 % short term fuel trim. when I raised the RPM to 2500 the short term and long term FT went down a little and when it warmed up it also got a little better down to 15% so I guessed I had a small intake leak as it got better as it warmed up and I noticed better trim when cold as I raised the RPM. I smoked the engine from the intake and after the motor got good and smoked I saw smoke coming from under the intake so that confirmed the leak. I will be installing a new Fel Pro intake gasket and while I am there new knock sensors. From the video's I have seen I need to clean the valley and build a silicon U shaped dam in front of the Knock Sensors. Thanks for the Video Good stuff!

@mrexecutive1 8 жыл бұрын

Thanks for walking us through your thinking process.

@SteveRobReviews 8 жыл бұрын

Paul my 02 chev 6 liter never had a code and only concern was a stumble on cold start. Once in closed loop trims were fine. I was chasing IAC until I smoked the intake and both banks were pouring out smoke at cold. Engine never exhibited any drivability until the temperature went below freezing. I like the water bottle idea a use it . Nice vid 👍👍

@nzkgb1486 8 жыл бұрын

Nice one Paul. Liked the format good to see a person when they are taking to you. I fixed an early 2000 cvic that would run on & ping because of carbon with that water trick no problem just dropped the exhaust at the manifold.

@glennefaw8118 4 жыл бұрын

Paul this was a very informative video. Thank you for the instruction and thorough explanations. That water test was a trick I didn't know. Great procedures for this scenario.

@LynxStarAuto 8 жыл бұрын

The water into the carb is a real thing. I witnessed my dad do it many a times when I was growing up. Clears the carbon right out. Especially useful on later emission dressed carb engines which would gunk up the intake manifold, and valves.

@eddiemartinez265 8 жыл бұрын

Hey paul jim posted a new video glad to see him back love this one great job.

@ephjay6t87 2 жыл бұрын

That water trick showed me the same problem with GF's 2003 5.3. white smoke appeared in the exhaust! Thank you so much.

@Bowhunter-ft8cn 4 жыл бұрын

Thank you for the details in this video. I have been searching ways to diagnose this and never understood the fuel trims and how to use them to help diagnose the issue. Never heard of the water bottle test neither and by golly it did exactly what the vehicle in the video did as soon as the water hit the intake manifold gasket area. I previously tried this with brake cleaner with engine cold as a friend suggested and got nothing. The water gave results immediately. Thanks again for the details given and the tips on how to use the data on the scanner to help diagnose. It really helped me to get a better understanding and I now need to replace my intake manifold gasket. Wouldn't have figured it out without your help.

@ScannerDanner 4 жыл бұрын

Best comment of the day! Thank you so much and nice job following along. That is credit to you. Not everyone is willing to understand this stuff

@MorbidXTC 3 жыл бұрын

Ran across this video after getting these codes on my 04 suburban with 5.3. water bottle trick definitely helped test the intake manifold gasket and my engine got rougher and steam did come out the exhaust. On cold starts I had noticed a rough kind of idle until warmed up for a little bit but no codes.. no clue... Warmed up and no problem til the codes today leaving work. Thank you for the simple test trick!

@ScannerDanner 3 жыл бұрын

Glad it helped! Thanks for the comment

@92camaro100 6 жыл бұрын

Thank you,may GOD bless you, because you just gave me and alot of people vital information on where to begin and check gaskets with water,i never new that,i always seen people check with carburetor cleaner.

@rexluongo6470 2 жыл бұрын

My grandfather used to pour tranny fluid in the carb or throttle body. Said it cleaned up the system like seafoam, before we knew about seafoam. Used to smoke like crazy. Don't know if it worked but if he did it, it probably worked. He was a rocket scientist, literally.

@freddysoto6584 8 жыл бұрын

Great diagnostics as always. Thanks for sharing your knowledge with everyone..

@dainbramage8608 Жыл бұрын

Thank you for making this video . I really appreciate you taking the time to do so . I am so impressed with your knowledge. I have a lean code and honestly it’s kind of fun trying to figure out what’s wrong . Thanks to the wonderful people like you that put videos on KZfaq. I can be a jack of all trades , master of none lol .

@ScannerDanner Жыл бұрын

Glad it was helpful!

@geekdiymechanic4539 8 жыл бұрын

Great video. I like when you think out loud. It allows me to follow your train of thought. Thanks for doing the video.

@ScannerDanner 8 жыл бұрын

+GeekDIY Mechanic thank you

@clintgray8976 6 жыл бұрын

Outstanding! Very thorough and explanatory in your troubleshooting methodology. 👍

@shaffer4220 3 жыл бұрын

This guy is good. My dad used to remove carbon from the pistons/cylinders by slowly dripping water from a turkey baster into the carburetors. Also, if the ole Holley carb got sone dirt he revved the engine and then quickly covered the top of the carb with his hand to clear the obstruction.

@jessevp2348 4 жыл бұрын

Thank you for making these videos like how you explain everything and show on screen the scanner.

@damianward2578 8 жыл бұрын

Nice diagnosis Paul, this is the first time I have seen the smoke tester in use, very impressive. The smoke testers also may be used to locate tricky exhaust leaks in the engine compartment I understand.

@stevenmullins9430 6 жыл бұрын

Hands down the best automotive teacher I've come across, and I've seen several. Please keep up the good work

@ScannerDanner 6 жыл бұрын

Thank you so much! Happy New Year

@Baby_j_GodsSoulja 4 жыл бұрын

Woooowww, great video, I just got thee PO171 code on my 2001 Chevy Tahoe, 5.3 liter 2x4 With 251,000 miles. I believe it’s thee original intake manifold gaskets... perfect timing. Because my knock sensors need to be replaced to. I have both codes also for those. Thanks a lot for thee info. Going to do the water test ASAP. 😎👍

@reneserrano8147 4 жыл бұрын

You are amazing, thank you for all the information, I have a Chevy pick up with a misfire code, this video explains a lot. Thank you again.

@terf7020 4 жыл бұрын

wow, this is a great, informative video. Earns a ranking of Super Duper on the terf scale. Thanks for taking the time to post it.

@ahmedhamoda2995 8 жыл бұрын

just thank you very much indeed scanner danner,, because of you i got my life back to me,, i started a new career and with your helpful videos am taking it forward step by step to successful man, you know only if i were living in the united states i wont miss your classes for the world, A REAL BIG APPRECIATION

@ScannerDanner 8 жыл бұрын

+Ahmed Hamoda that is awesome to hear the impact of this channel on your life. I am blessed to know this. Thank you!

@Sandbag1300 8 жыл бұрын

Outstanding diagnostic video. As good as you ebook! Really enjoyed watching the Snap-On smoke machine work. Mostly because it was a Snap-On.

@frugalprepper 6 жыл бұрын

I love the water trick. With no smoke machine I have been watching fuel trims while putting some propane or brake cleand down around the intake and seeing if they correct. It always a little nerve wracking to introduce a cloud of explosive fuel around a running engine though. Water seems like it may be a safer way!

@W.Khairi 5 жыл бұрын

ScannerDanner at the top of the game as usual, Thank you very much.

@lucianlucian9911 7 жыл бұрын

A cool video, as usual! Ha ha, that part when you poured water on the intake manifold and the tail pipe started to make smoke circles was pretty funny.

@nathanzupancic6528 8 жыл бұрын

Thanks for the video! Trying to diagnose the 0171, 0174, and an 0101 code on my truck for emissions testing. When the engine is hot at idle I am getting near zero trim numbers and between 10-19% when hot at highway speeds. Like your truck, my code set at 143* or so. This makes me far more confident that I can fix this issue!

@ScannerDannerPremium 8 жыл бұрын

+Nathan Zupancic cool man, sounds like your issue too

@SaqibKhaliq 8 жыл бұрын

I learnt something today. Thanks Paul, keep up the good work 😀

@dadsgonenuts Жыл бұрын

I appreciate your videos SD very informative I just want to say I had all of the same codes along with others so I started replacing everything fuel injectors spark plugs coil packs mass air flow sensor and was tempted to put a new intake manifold & gasket on it but first I started doing some research on what individual components do & control in which led me to check the fuel filter & after struggling to blow through it I realized that it was indeed clogged not all the way but enough to give the codes P0300 P0171 P0174 P1131 P0443 P1400 so I change the fuel filter and thankfully all the codes went away & because I wanted to be convinced that that was my problem the whole time I started taking off the new equipment and putting the old equipment back on and to this day no codes.. Thanks again for your videos and help. 🇱🇷🇱🇷🇱🇷

@wysetech2000 8 жыл бұрын

Another outstanding diagnostic video, Paul.

@stevenbellll 3 ай бұрын

THANK YOU SO MUCH! In your videos, you have taught me so much. You're not just posting guess videos. You're slick. You just fixed my Tahoe! Again, thank you so much.

@ScannerDanner 3 ай бұрын

Happy to help! Thank you!

@jenniferflor2264 6 жыл бұрын

Thanks ScannerDanner! We tried the water squirting trick on our 2004 Suburban and nearly killed the engine. I think we found our problem ;)

@erickrgarcia 5 жыл бұрын

Very good video! Thanks for the tips on checking for possible air leak trouble shooting.

@joginderdeol1109 4 жыл бұрын

Best teacher best guy best technician. Way off explanation is easy to understand hats off thanks

@PRSQUAD88 5 жыл бұрын

Very nice job I like seeing videos like this showing people the little tricks and stuff showing people how to do it yourself you don't need expensive tools to do it

@goenitzlopez9391 8 жыл бұрын

hay paul, I want to thank you for all your teachings, I've recently utilized 2 techniques learned from you. First one was I finished an engine swap on a nissan 360z, and after finishing hooking everything back up the engine would crank properly but backfire and would not start at all. Similar to a distributor out of time, of course this engine is COP. Turns out I had incorrectly hooked up 2 coils per bank. I had the cables reversed, and I came to that conclusion from a video I had seen from you before. I caught my own mistake. Second one just today, 2003 ford focus 2.0 DOHC, engine would stall out immediately when you would press the GAS pedal while in drive. If you revd the engine while in Park, neutral, or reverse (you could reverse fine) the engine would run fine. put it in any forward gear and it would idle fine, as soon as you hit the pedal it would immediately stall out, no chance to do anything, no real chance to even look at any live data. There were no trouble codes. I tried unplugging the tps, no dice, maf, engine wouldnt run with the maf unplugged, no backup strategy without maf, I then unplugged the upstream oxygen sensor, and whaddya know, engine ran fine (with the check engine light on of course). New O2 sensor and the car is now fixed. Thank you for teachings paul

@ScannerDanner 8 жыл бұрын

+Goenitz Lopez thanks man!

@thelazyhandyman8581 2 жыл бұрын

Thanks man. This is definitely something that will point me to the right direction. Very well explained.

@jptrustno1 4 жыл бұрын

This guy is good, really really good. He teaches students, and he knows how to use the snapon scanners probly better than anyone else that i know and i been doing this for 20+ years and i STILL cant do half the stuff my modis edge offers.

@charleswittmer2477 4 жыл бұрын

this is what IBM would call a specialists in a certain area. not a normal mechanic. now, if his hands are correctly connected to his brain? some instructors can barely hold a tool.

@Magnacharger07 6 жыл бұрын

I like the water bottle test it's a good one. My silverado had the intake leak but would run great cold once warmed up would surge and hesitate. Intake gaskets cured it.

@JMATUS24 5 жыл бұрын

Reminds me of my instructors in school. Your the man!

@baxrok2. 8 жыл бұрын

Well done Paul. Thanks for explaining and then demonstrating this so clearly. These lean codes are most certainly something to become well versed in as they seem to be very common.

@codyfryer1003 5 ай бұрын

One of the most detailed videos ive come across on the LS engine. Thank you sir

@ScannerDanner 5 ай бұрын

Glad you enjoyed it!

@DeignsByPrincess 6 жыл бұрын

Man, I’m happy I watched your video. Thank you

@Herbotune 6 жыл бұрын

Thanks so much for this excellent information which you present very well. I have a similar car with similar symptoms and codes. Very, very helpful.

@nfotabongconrad3564 5 жыл бұрын

Oh man... You're so dedicated to teach us Scanner Danner. Taking some extra of your time just so we can see on our own what is actually going on. We can't thank you enough... I mean... you're such a great person before being an awesome instructor.

@nicholaselias8542 8 жыл бұрын

my bro-in law's 2008 trailblazer was throwing a p0171 code with similar data. i also suspected vacuum leak and did a smoke test and found smoke billowing from the intake. it turned out some of the bolts had backed out and I tightened them and then the numbers went back to normal. they were so loose i was surprised they didnt fall out

@JohnnyMacTahoe 6 жыл бұрын

Had the exact same codes on my 2000 Silverado 327. (5.3) Cleaned the mass airflow sensor... no more bogging or missing - runs like new - no more codes - no more trouble light.

@devonjefferson982 6 жыл бұрын

Johnny Mac I hope that's my problem!

@JohnnyMacTahoe 6 жыл бұрын

Yea, hope so. It's certainly worth trying first because it's cheap and easy. They make a spray cleaner specifically for the MAS, use that. Best of luck.

@codymcfadden8856 6 жыл бұрын

327?

@JohnnyMacTahoe 6 жыл бұрын

327 cubic inch. That's American for 5.3 liter

@kklg911904 6 жыл бұрын

Its 323 cubic inches not 327

@joemikos9155 8 жыл бұрын

Man, you love your job. Another great vid Scanner! Thanks

@chrisbain7773 6 жыл бұрын

I do thank you as I have been to 3 garage's with no help as I have a code P219B as everyone says it is sponsor 2 bank 1 but the light will not come on till I am on the road for 2 hour s . As I do thank you for the water test as that helped me out a lot , I have a 2010 Chevy truck Great Video .

@calimesacox 10 ай бұрын

32 years Heavy line for the first 12... Went to Aftermarket independent shop and started doing Diagnostics and I am in a love hate relationship with vehicles.

@a2z_farm 5 ай бұрын

Wow you Are so awesome. Older video. But your layout of fuel trims,....water bottle testing, full functionality of the scanner is so profound in the layout process. This is why i continue to always come back to your videos... im dealing with po161,171,164 right now. 2000 suburban 5.3. 8.5 mpg right now Be Blessed Richard Iowa

@ScannerDanner 5 ай бұрын

Define the codes for me. Thanks! I know what the 171 is

@adanarceo4636 5 жыл бұрын

Thanks for sharing your knowledge my brother and for your time and dedication to make this videos, 👍👍👍

@ozzstars_cars 8 жыл бұрын

Good information on intake leaks. Thanks for posting

@chrisday4885 2 жыл бұрын

Great info, tons of knowledge and knowhow ! And I really loved the birds in the back ground 🐦 Thanks...

@alanv3379 8 жыл бұрын

awesome video mr danner like always thank you and GODBLESS you family

@stephenbates8370 8 жыл бұрын

another exelent presentation. thanx for going through the prosses of elimination that makes all the difference for me :)

@tam5176 5 жыл бұрын

I've got the exact same codes P0171, P0174 & P0300 broken stud from when I replaced the knock sensors, so will go with the water test in the morning.

@Dad19676 4 ай бұрын

i have the same problem with my chevy tahoe. You gave me hope for tomorrow. explained very well. can't wait to try the water test.. thank you

@ScannerDanner 4 ай бұрын

Let me know what you find!

@robqcmccullum8797 8 ай бұрын

Yes when I started as a Tech working for Cadillac and Olds on HT4100 V8 we would use top engine cleaner and pore water down the throttle body to clean carbon and also soak the top with some of that solution for awhile and start it up later,nice work

@dannychuqui4797 8 жыл бұрын

Good videos as always..... thanks for explaining us.....keep up !! and is good thing when is explained with examples to better understand ing and finding different ways and much easier to work in cars......good job!!

@sergiozarzoza6926 3 жыл бұрын

Te felicito por tu diagnostico, eso es el código del p0171 p0174 en Chevy

@LadyBugFoxyRoxy 8 жыл бұрын

Awesome video ...Great job explaining the diagnostics process.

@ScannerDanner 8 жыл бұрын

+Tony Marks thanks Tony!

@Thefox2000unit 6 жыл бұрын

As per usual, excellent vid. Love it! Keep them coming, please. Fox. N/ W Scotland

@brycethoreson9216 4 жыл бұрын

I would love to be your apprentice. I would learn so much more than I am at my shop. We're told "here is a diag you've never done before, figure it out in an hour by yourself, good luck"

@ScannerDanner 4 жыл бұрын

well you certainly can be my apprentice remotely :-) I also have a premium channel that invites you into my classroom if you are interested www.scannerdanner.com/join-scannerdanner-premium.html Hope to see you there!

@DaveSender66 7 жыл бұрын

thank you Paul I appreciate you sharing this information with us! very much appreciate your willingness to share your god-given talents with the rest of the world I commend you my friend ! Your book is awesome! !!!!!

@russelldibiase605 6 жыл бұрын

DaveSender66 I

@rogerpatrick3642 5 жыл бұрын

I was saying you got really good with the camera doing pop ups in everything you should direct a movie LOL nice going love it

@timowallin8020 8 жыл бұрын

Great one! In here. We hardly have V-type of engines. So mostly only one bank and so it makes it harder to make a call on B1S2O2's if they move like normal o2 on could cat. This one makes a hope that maybe there is ligth in tunnel. To look more then just volt change(at450mv) and make it go on both ends of the range... Thanks for that! That white text on white car is great to read, if you are tired, btw ;) Cheers! Timppa

@0514april Жыл бұрын

I think I like you personally. The knowledge is great too.

@neocatharry2693 7 жыл бұрын

Love the water test also. My car stalls at low speeds and when I brake but when engine is hot. I don't have a fancy scanner so I can't determine what exactly is going on but I suspect my problem to be a vacuum leak and not caused by intake manifold. Will open hood and perform visual inspection to see if there's any hoses that are torn or disconnected. Will also test fuel pressure at fuel rail to check pressure.

@juanar6233 5 жыл бұрын

Love using the water test for vacuum leaks.

@armandomrgl85 6 жыл бұрын

Great video, I have a 2001 Chevy Suburban k1500 5.3L as I was driving from a long trip on the freeway all of a sudden I started losing power & felt like it was going to shut off, I pulled over the engine idled fine, I turned it off for a few minutes & it starred right up. I drove it home then hooked up my obd2 scanner & got p0171 & p0174 codes, then after a while the check engine light came on. I put in a new fuel filter a few months before any of these symtoms started happening just as maintenance since it had never been changed, It starts up within seconds even when the engine is cold. I cleaned the maf sensor reconditioned the K&N FIPK filter & reoiled it with K&N oil, checked for exhaust leaks, put water around the intake manifolds, but didn't find or hear anything out of the ordinary. I thought maybe I had bad fuel so drove it close to empty & put new fuel in. When driving it feels like it's lacking power, at times while on the freeway it starts shuttering, kind of like when you get a misfire, but it doesn't misfire. I will watch your video a few more times to make sure I understand everything. Thanks in advance for any help if you're able to answer my question.

@slayer91340 6 жыл бұрын

armandomrgl85 how old is your fuel pump?

@armando8540 6 жыл бұрын

Robert Contreras I've never replaced it, so it's probably the original fuel pump. I bought the Suburban when it had 38,000 miles

@joelthomas3823 3 жыл бұрын

Awesome, same codes and symptoms cold, did the water test, engine started running rough , intake leak of drivers side rear, thank you very much for the video!

@ScannerDanner 3 жыл бұрын

Such an easy and SAFE test. Not sure why some dog it

@RR-yp8xo Жыл бұрын

Good shot ! I'm feelinlg that. Keep up the good simple diagnosis .👍🏾

@hallz9117 2 жыл бұрын

tightened mine up, runs great now !!!!!!!!! THANKS BROTHER !!!

@17Shkurt2008Pavarsia 2 жыл бұрын

If you have cleaned the mass air flow sensor, checked your evap and vacuum lines and the P0171 code is still coming on, try throwing some injector cleaner in your gas tank because that code can come up from a clogged fuel filter, fuel pump, high pressure fuel regulator or dirty injectors too. I threw 2 bottles of injector cleaners at 2 full tanks of gas and it fixed the code for me. 2005 MK4 Volkswagen Jetta 2.0L

@jesusvaldes4664 Жыл бұрын

Subscribed right after this video I’ll keep you updated on the condition of my 04 1500 Silverado.

@ScannerDanner Жыл бұрын

Thank you! Looking forward to hearing if your truck has an intake gasket leak or not

@adavidson116116 5 ай бұрын

Thank you for this. I just caught a manifold leak on my 02. Shed only misfire when idling without really cold outside temps on when the engine was cold. Did this water test after reading a code of lean. And she started misfiring abit and smoke would pickup out the tailpipe.

@ScannerDanner 5 ай бұрын

Sweet! It's a great test for sure

@giovanyrivas9600 2 жыл бұрын

Ur genus thanks to share ur knowledge i hope u millions of happy clients

@KTHKUHNKK 5 жыл бұрын

Excellent video my friend tomorrow is another day and I will get on it. Thanks Keith Kuhn

@terrybirdhowtod.i.y6008 4 жыл бұрын

Awesome video!!! So I been goin threw my 00 Silverado with th 4.8. Kept throwing po171 and 174 code and at one time it had a random misfire code. Like yours mine runs good when it’s warm but at a really cold start it’ll idle up to about 1500 rpm then it’ll run back down to about 400 rpm with a lope!!! So I watched your video tried the water trick and sure enough, almost identical to yours it was mainly at the back of the intake. Got to looking and some of the water actually came out my exhaust pipe. Thanks for the help as I am now online ordering me an intake gasket