GMC YUKON DTC P0446 - EVAP Vent Control Problem, Check Engine Light On? EVAP System Diag & Repair

in this video I'm gonna share with you how to diagnose and fix a P0446 Trouble Code On a GMC Yukon! Evap System Testing! #evaporative #EVAP #gmc

[@sneakdza]

First time I’m understand purge valves & vent valves, I can sit thru the whole video cause the explanations are simple & good & I visually see what he’s talking about

[@KITS_Auto_and_Truck_Repair]

@sneakdza Thank you!

[@Clamlifenc]

I wish he lives in my city bc I’ve been to many mechanics just change new parts without diagnosing the problem and wasted my money. Thank u for educating us!

[@KITS_Auto_and_Truck_Repair]

@vallynng My Pleasure! Thanks

[@Taldish]

Deo, your adherence to logic and thoroughness is inspirational. After watching one of your videos I have a deeper understanding of the systems you are working on. You are a wonderful teacher and I am grateful.

[@KITS_Auto_and_Truck_Repair]

@Taldish Thank you! I appreciate it!

[@Whitetrash_Customs]

Absolute best diagnostic videos ever!!!!!!!!!!!! Thank you sir

[@KITS_Auto_and_Truck_Repair]

@zaneedwards7869 My Pleasure! Thanks

[@manuelguerrero8378]

How about opening a way to communicate with you, greetings.

[@KITS_Auto_and_Truck_Repair]

@@manuelguerrero8378 you can communicate with me via email at [e-mail]

[@notsureigaf]

Glad you uploaded the video, your voice wasn't nearly as distracting as you thought and the diagnosis was a masterclass 👍

[@KITS_Auto_and_Truck_Repair]

@notsureigaf Thank you!

[@superlee63]

Mysteries of the EVAP system finally solved. I now understand the evap system. You explain things very well. Thanks for a great video!

[@KITS_Auto_and_Truck_Repair]

@superlee63 My Pleasure! I'm glad to hear that the video was helpful!

[@Geed94]

Thanks for sharing this excellent diagnosis with us and get well soon👍.

[@KITS_Auto_and_Truck_Repair]

@Geed94 My Pleasure! Thanks

[@JBB1636]

you are really good Sir in explaining the possible trouble and finding the problem. i am not a mechanic but i love watching your videos explaining the function and operation. thanks

[@KITS_Auto_and_Truck_Repair]

@JBB1636 My Pleasure! Thank you!

[@junulock]

Good explanation. I ran into a similar problem on my 2010 Chev Silverado 1500 pickup. Had the check engine light on. I hadn’t had the truck too long. Bought new. Had the dealer check. They told me I basically had a tiny vacuum leak. That they reset and cleared the code. Me being from old motors asked that there wasn’t a serious oil pressure issue. They said no. That your alright to drive it like that. Said that minuscule leak to find it would be like looking for a needle in a haystack. They said if it comes back up bring it back and they’ll dig further. Wasn’t very long and it was back. Didn’t go back. Drove it like that a long time. Ran into other issues way later on. Local guy fixed those. Then with this he had a diagnosis tablet but started first looking that the gas cap was sealing. I said it’s almost like I smell gas when I fill up and I questioned if the feed in tube was cracked or something. Anyway he cleared it and it was right back. With what he could on the tablet we then changed the vent module. Had to cut the hanging spare down as it was located above that under the box. Got that changed. He said that was stuck open. He cleared the fault but at the same time took my hand mirror to try look at the fuel pump and sending unit that sits in the top of the tank. He said it looked like it was wet. I had it maybe a few days and the same fault. Well this next job just like you have here; getting to and pulling the fuel pump/sending unit will cost you plenty in a garage. Some people have been known to cut a hole in the box to get at it. Well he took and dropped the tank. Found the plastic flange that is on the unit, that sits against the tank when it’s dropped in was cracked about half way around. Saw the pics. Got that removed and replaced. End of check engine light issues.

[@KITS_Auto_and_Truck_Repair]

@junulock Oh man!! That's too bad

[@dougpfaltzgraff]

wow....a perfect diagnosis and fix.....i need to buy a bidirectional scan tool

[@KITS_Auto_and_Truck_Repair]

@dougpfaltzgraff Thanks! a Bidirectional scanner is nice!

[@josephbonilla5910]

Hello brother good to see you again thanks for sharing your knowledge GOD BLESS YOU

[@KITS_Auto_and_Truck_Repair]

@josephbonilla5910 Hello Brother! My Pleasure, Thanks

[@beerai74]

Well, no problem comprehending whatever you're saying. Thanks for the vid

[@KITS_Auto_and_Truck_Repair]

@beerai74 My Pleasure!

[@issacpalomas9026]

Muy buena explicación, la mejor que eh visto 👍🏼 Great Job 👏

[@KITS_Auto_and_Truck_Repair]

@issacpalomas9026 Thank you!

[@lyndondancel9400]

Very meticulous in your diagnosis! Thank you!

[@KITS_Auto_and_Truck_Repair]

@lyndondancel9400 My Pleasure! Thanks

[@lonewolf744]

Great explanation on the evap system. I have an evap vent control system circuit code. Shop replace the vent solenoid, and the code is still there. I'm guessing I have a wiring issue somewhere.

[@KITS_Auto_and_Truck_Repair]

@lonewolf744 Thanks! Yes you might have a wiring problem!

[@staym925]

Thank you, you are a great teacher, great breaking it down and explaining.

[@KITS_Auto_and_Truck_Repair]

@sethtaylorm925 My Pleasure! Thank you!

[@Rekani-sq5nl]

Well done for fantastic explanation

[@KITS_Auto_and_Truck_Repair]

@Rekani-sq5nl Thank you!

[@mohammadal-gebaly3046]

At the beginning , I hope you are fine and you are better now , secondly I enjoyed watching your informative videos , thank you very much my friend , it is appreciated as usual , thanks Deo.

[@KITS_Auto_and_Truck_Repair]

@mohammadal-gebaly3046 My Pleasure! Thank you

[@phillipkaluma9478]

Thanks for the video and wishing you a quick recovery.

[@KITS_Auto_and_Truck_Repair]

@phillipkaluma9478 My Pleasure! Thanks

[@billiespencer9670]

Great job! Very professional and proficient. It renews my faith that there are good and reputable mechanics still around.

[@KITS_Auto_and_Truck_Repair]

@billiespencer9670 Thank you!

[@eddyvila6686]

You are the best I'm learning with you thanks your my teacher

[@KITS_Auto_and_Truck_Repair]

@eddyvila6686 My Pleasure! Thanks

[@erno9248]

Just to say "You are a excellent teacher" THANKS...

[@KITS_Auto_and_Truck_Repair]

@erno9248 My Pleasure! Thanks

[@svhebert]

Deo, I finally fully understand how the Evap system. Thanks to your great teaching 👍 by the way get some honey and lemon tea for your voice bro !

[@KITS_Auto_and_Truck_Repair]

@svhebert My Pleasure Bro! Thanks I will get some honey and lemon tomorrow, I appreciate you!

[@firstalawal]

finally I understand EVAP system and how to test it thanks man 👍

[@KITS_Auto_and_Truck_Repair]

@firstalawal My Pleasure!

[@guymaninu]

Great video! I can understand everything you are saying. Thanks for being so detailed 👍🏽

[@KITS_Auto_and_Truck_Repair]

@guymaninu My Pleasure! Thanks

[@selloelias-l3m]

Thank you for explaining that system

[@KITS_Auto_and_Truck_Repair]

@user-zn8xb8ve4r My Pleasure!

[@biggabe4904]

Well I replace the purge valve and the vent valve, but didn't do the fuel tank pressure sensor, that might be my problem. I dont have obd scanner, just have a cheap scanner that gives codes only. Well guess what I'm doing buying the pressure sensor for fuel tank. Hopefully my check engine light goes away. Thanks for the break downs.

[@KITS_Auto_and_Truck_Repair]

@biggabe4904 My Pleasure!

[@PaulCTownsend]

Great job and explanation and your voice is fine.

[@KITS_Auto_and_Truck_Repair]

@PaulCTownsend Thank you!

[@travisdeal7485]

I understand everything you were saying. But I need to understand if I don't have the scan computer that you have. But I do have a FIXD SCANNER which told me that the code P0446 indeed is the code. Soooooooo what I'm asking is can I just change the part since it's telling me that it's one are the other, most likely it's the one by the fuel tank. Only because I don't have all the tools you have. ( So can I just change the part myself ) Thank for giving us understanding to this.

[@KITS_Auto_and_Truck_Repair]

@travisdeal7485 you should have it checked because the issue could be the sensor wiring!

[@MyManx2]

Great video helped me with understanding the purge valve and pressure sensor

[@KITS_Auto_and_Truck_Repair]

@MyManx2 Thank you!

[@richardc6038]

Hope you feel better my brother

[@KITS_Auto_and_Truck_Repair]

@richardc6038 Thank you my Brother!

[@numanahmed8752]

What to more videos like This. I really like your videos. Thank you ❤

[@KITS_Auto_and_Truck_Repair]

@numanahmed8752 My Pleasure!

[@abbasmuhsen2715]

You did your best job But why the engine control unit not show code of fuel tank pressure sensor fault Thanks bro

[@KITS_Auto_and_Truck_Repair]

@abbasmuhsen2715 My Pleasure! That's a good question, I also wondered why the PCM didn't set a fuel tank pressure sensor fault code, but I think it's a computer logic issue! I'm not really sure though!

[@abdallahtanjawi9421]

good job and you are 🎓professor

[@KITS_Auto_and_Truck_Repair]

@abdallahtanjawi9421 Thank you!

[@danieljones8587]

Good job, very informative. Thanks for your effort.

[@KITS_Auto_and_Truck_Repair]

@danieljones8587 My Pleasure! Thanks

[@kondwaninampeya5780]

this test is another level, keep it up.

[@KITS_Auto_and_Truck_Repair]

@kondwaninampeya5780 Thank you!

[@Franklinveterinarycenter1of4]

take a day or two and get well before you get real bad sick. great video!

[@KITS_Auto_and_Truck_Repair]

@hypocrisyrules Thank you!

[@ysitrim88]

Awesome man, you make great videos! I just subscribed 😊

[@KITS_Auto_and_Truck_Repair]

@ysitrim88 Thank you and welccome to our youtube community!

[@andydugan1911]

Very thorough test. Nice job! I have a 2002 chevy silverado and have had p0446 on my truck for a long time, could very well be the same problem. Thanks.

[@KITS_Auto_and_Truck_Repair]

@andydugan1911 Probably! Thanks

[@AliIbrahim-d5v]

Great repair video thank you I have question Would you recommend autel scanner elite pro || I’m trying buy one Thank you 🙏🏾

[@KITS_Auto_and_Truck_Repair]

@user-mo8gt3uv4o My Pleasure! Autel makes great scan tools, but before I give you a good advice on what scan tool to buy, I would like to know what type of vehicles you are gonna be servicing!!

[@alejthagreat]

Hello Deo, I learned a lot from watching your video! I’m researching how to fix my P0446. On my initial scan of my vehicle it said it has “excess vacuum” and well it tends to spit gas back out when fueling. Would that be because the vent valve is bad? Would maybe need replacing? Would love to hear your opinion

[@KITS_Auto_and_Truck_Repair]

@alejthagreat Yes! your vent solenoid might be clogged, you should test it and see if it's working properly!

[@alejthagreat]

@@KITS_Auto_and_Truck_RepairThank you!

[@1PaJoe]

Great video - thanks for all the detail

[@KITS_Auto_and_Truck_Repair]

@1PaJoe Thank you!

[@ganeshnarayan5505]

Great video thanks for sharing.

[@KITS_Auto_and_Truck_Repair]

@ganeshnarayan5505 My Pleasure!

[@KeyshaHaynes]

you are a bad man keep up the good work

[@KITS_Auto_and_Truck_Repair]

@user-ln5qn3pd2r Thanks!

[@JattaVictor]

Good work is victor jatta from Gambia

[@KITS_Auto_and_Truck_Repair]

@user-dz4jb5rg6k Thank you my friend from Gambia!

[@robertomijango6207]

you are the bets my friend

[@KITS_Auto_and_Truck_Repair]

@robertomijango6207 My Pleasure! Thanks

[@chankokhoi4496]

Good and best video Brother

[@KITS_Auto_and_Truck_Repair]

@chankokhoi4496 Thank you Brother!

[@mohdali-sc8wr]

👍👍👍 in this case did the custmer complaind the smil of fuel inside the cabin or around the car?

[@KITS_Auto_and_Truck_Repair]

@mohdali-sc8wr No!!

[@TimothyKrissilas]

Thank you it was easy to understand

[@KITS_Auto_and_Truck_Repair]

@TimothyKrissilas My Pleasure!

[@DuaneDonaldson]

You mentioned a circuit problem which can be technically correct, not so much a wire problem as a component electrical failure, my GMC Library shows a clogged Vent Filter and a Fuel Tank Pressure (FTP) Sensor for this code. I hope yours is different so I can add another repair to my Library, still watching......Well, no luck today. I wish you would have at least retested the sensor signal pin to verify a voltage change and the correct voltage that should come from the FTP at static atmosphere pressure, the bad sensor showed 0.25V if I am correct. If you perform a test procedure on a bad part, please follow up with the same test procedure on the NEW part as well so we all know what a good test looks like on a good part. We also do not want to waste our time to bolt up the fuel tank in this case just to read the scan tool and notice a problem with the new part, now we need to drop the tank again, order another new part, etc, & do the proper test procedure again before bolting up the tank, YES, PLS. Many of us simply don't fully trust the scan tool so we like to back up our testing with direct voltage testing at the sensor which you did half of the procedure. Thank you for all the videos that you produce, very much appreciated. SMA listed it as a GMC and Chevy, its been highlighted in my library to move it to Chevy only, your video will go in GMC LOL, kzbin.info/www/bejne/aofEpIaJjqeUopY

[@KITS_Auto_and_Truck_Repair]

@DuaneDonaldson Good point but for me the voltage change on the scan tool's Fuel Tank Pressure sensor Data Pid after replacing the sensor was enough evidence that the problem was fix, the voltage went from 0.2v to 1.5v I believe!

[@DuaneDonaldson]

OK Brother, but I would verify the scan data before bolting up the fuel tank, love your stuff. But for training, I would measure volts since we all know scan tools are not 100% trustable. I just watched a video today, APPS scan data 0V, scope at ECM proper volt sweep, car drives ok, BAD ECM not calculating APPS data to the scanner so ECM logic also not fully trustworthy, no worries mate.@@KITS_Auto_and_Truck_Repair

[@jbarojas7]

Respect 🎉u are my favorite person nice friend

[@KITS_Auto_and_Truck_Repair]

@jbarojas7 Thanks!

[@chrispinnyala1796]

Hi I’m so happy for u’re explanation but I have same yellow light stay on. I have Mercedes Benz E 350 4 Matic 2011. Where’s your location I can bring to you. Thank you

[@KITS_Auto_and_Truck_Repair]

@chrispinnyala1796 My Pleasure! our shop is located in Dickerson MD! you can email me at [e-mail] for shop info and address!

[@ByGraceThroughFaith777]

Bro your explanations are crazy good 👍 got a new sub!

[@KITS_Auto_and_Truck_Repair]

@ByGraceThroughFaith777 Thank you! and welcome to our youtube community!

[@johnnyt1408]

Keep up the great work

[@KITS_Auto_and_Truck_Repair]

@johnnyt1408 Thank you!

[@ladeishawilliams7735]

Great video, Deo!

[@KITS_Auto_and_Truck_Repair]

@ladeishawilliams7735 Thanks! Good to see your comment!

[@iDionSingh]

Gracias hermano 🙏🩵😊

[@KITS_Auto_and_Truck_Repair]

@iDionSingh My Pleasure!

[@tovarusperkins3955]

Excellent video brotha thanks

[@KITS_Auto_and_Truck_Repair]

@tovarusperkins3955 My Pleasure!

[@chankokhoi4496]

Thank Brother 👍👍👍👏👏👏

[@KITS_Auto_and_Truck_Repair]

@chankokhoi4496 My Pleasure Brother!

[@benjamintorres6177]

Thank you friend.😅

[@KITS_Auto_and_Truck_Repair]

@benjamintorres6177 My Pleasure!

[@JPDC1991]

Good job 👍

[@KITS_Auto_and_Truck_Repair]

@JPDC911 Thank you!

[@williamcazorla5873]

Great video. Thanks.

[@KITS_Auto_and_Truck_Repair]

@williamcazorla5873 My Pleasure, Thanks

[@freds5109]

Hello I have a 2005 Chevy Tahoe 5.3 and it won’t crank from key but I can crank it with a wire rand from the stater relay to the battery could u help with some information on how to get it to crank with key

[@KITS_Auto_and_Truck_Repair]

@freds5109 you mightt have a starter relay issue or a ignition switch issue, I recommend you take it to a Pro mechanic who can diagnose it for you!

[@danielramos6006]

My bad ftp sensor had 0.22v when good one installed 1.5v I was able to confirm system sealed properly due to system building pressure and being able to hear system release pressure when gas cap was removed. 😊

[@KITS_Auto_and_Truck_Repair]

@danielramos6006 Great job!

[@robertvillarreal3519]

So basically if the air is getting trapped in the gas tank that means the vent and purge valve are working ?

[@rasheedelwaseem549]

thank you so much

[@KITS_Auto_and_Truck_Repair]

@rasheedelwaseem549 My Pleasure!

[@charlyreyesolivares197]

HEY MAESTER GREETINGS TO YOU AND ALL YOUR FOLLOWERS HOW ARE YOU? 👍👍🙏

[@KITS_Auto_and_Truck_Repair]

@charlyreyesolivares197 Hello my Friend I'm doing better! how are you?

[@GRS-gd3ig]

mine is building up a lot of pressure in the gas tank with this code. would it be charcoal canister? if replaced every other part you have tested.

[@KITS_Auto_and_Truck_Repair]

@GRS-gd3ig if the pressure in the tank is too high, you might have a stuck closed vent solenoid!!

[@alexsu9102]

Great job.

[@KITS_Auto_and_Truck_Repair]

@alexsu9102 Thank you!

[@wsnxumalo6707]

Oh the job is good but I was totaly lost I didn't understand what was being done. From South Africa

[@KITS_Auto_and_Truck_Repair]

@wsnxumalo6707 Thanks! watch my other Evap videos, they might be a bit easy to understand,

[@humbertoarellano8887]

What kind of scanner, do you use?

[@KITS_Auto_and_Truck_Repair]

@humbertoarellano8887 in this video I used my snapon zeus scanner!

[@jagiii820]

I subscribe to your channel just because

[@KITS_Auto_and_Truck_Repair]

@jagiii636 Thank you and welcome to our youtube community!

[@fireboy5043]

Great info Thanks Bro 👍🏽#GetWellSoon

[@KITS_Auto_and_Truck_Repair]

@fireboy5043 Thank you!

[@GabrielEbenezer-b2s]

May God help me to understand scarn tools very well 🙏🙏🙏😢🙏

[@KITS_Auto_and_Truck_Repair]

@user-dw7jv9zi1d keep working, you will master it!

[@GabrielEbenezer-b2s]

@@KITS_Auto_and_Truck_Repair please sir how can I get a very good scan tool like your own am in Nigeria

[@cswsigmaka]

You’re a doctor

[@KITS_Auto_and_Truck_Repair]

@cswsigmaka Thank you!

[@buboybebing3716]

hello my friend,,

[@KITS_Auto_and_Truck_Repair]

@buboybebing3716 Hello my Friend, how are you?

[@Mikey-wf9py]

I got same truck with p0420.... Then it threw at p0300... I hope my cat is just clogged and caused the 300 code

[@KITS_Auto_and_Truck_Repair]

@Mikey-wf9py it could be!

[@GabrielEbenezer-b2s]

So if at all uou changed the Evap sensor it wouldn't have work out so now the problem is that the fuel pressure sensor that got spoiled triggered the evap code on

[@KITS_Auto_and_Truck_Repair]

@user-dw7jv9zi1d Sorry! I didn't understand your question!

[@noelconnor8539]

Singing too much reggae😂😂😂❤❤❤❤❤🎉

[@KITS_Auto_and_Truck_Repair]

@noelconnor8539 Lol!!

[@PaulCTownsend]

As you know the vehicle will not run the test with the fuel level in between half an empty.

[@KITS_Auto_and_Truck_Repair]

@PaulCTownsend Yes That's right!

[@beerai74]

Hi Sir. I have emailed you regarding my Freightliner Sprinter 2500. I hope you will be able to respond to me after reading it. Thanks in advance.

[@KITS_Auto_and_Truck_Repair]

@beerai74 I must have missed it, can you send it again!

[@beerai74]

@@KITS_Auto_and_Truck_Repair just did it. If you could check it. I hope it didn’t go to your spam folder

[@KITS_Auto_and_Truck_Repair]

@@beerai74 Ok!

[@fatbastardwithabeard]

Nice video. Full of good info.

[@KITS_Auto_and_Truck_Repair]

@fatbastardwithabeard Thank you!

[@weather271]

Good job 👍

[@KITS_Auto_and_Truck_Repair]

@weather271 Thank you!