HOW TO FIX P0171 & P0174 Codes + COMMON E46 VACUUM LEAKS

Welcome to ShopLifeTV!
In this video I go over the most common causes for the p0171 and p0174 codes. These codes are set by the o2 sensors detecting a lean condition on either of the banks. I show the problem areas including common vacuum leaks on the e46.
Videos:
CCV Replacement: • Part 1: How To Replace...
How to remove intake manifold: • BMW E39/E46 Intake Man...
Disa Valve Replacement: • BMW E39/E46 DISA Valve...
Parts:
CCV Kit:
goo.gl/1JTzwG
Fuel Filter:
goo.gl/uEFKQV
Intake Air Temperature Sensor:
goo.gl/Pog6Vw
Fuel Pump:
goo.gl/CGbtK3
E46 330
MAF Old Style:
goo.gl/jUxdMf
MAF New Style:
goo.gl/z69DQe
DISA Valve:
goo.gl/LrkDNU
Lower Intake Boot:
goo.gl/Ff4Pa6
Upper Intake Boot:
goo.gl/BKAtDf
E46 325
MAF Old Style:
goo.gl/1RWf1k
MAF New Style:
goo.gl/LyFCwW
Disa Valve:
goo.gl/hRDS4H
Upper Intake Boot:
goo.gl/x58kmG
Lower Intake Boot:
goo.gl/42mhUR
Merchandise: www.shoplifetv.com
LS3 Swap: / @bmwselena
Vlog Channel: / @moreshoplife
Instagram: @ShopLifeTV
/ shoplifetv
Disclaimer: The product links provided are often associated with an affiliate. When using any of the affiliate links I may get compensated for any products purchased using the link. This compensation does not affect my views on the product.

[@ShopLifeTV]

In the description box I listed and linked videos and products that might help! Check Out My Vlog Channel: kzbin.info/door/LSzYSOa2LIAHmuYgefMQlg thank you!

[@Alex_Edits85]

ShopLifeTV I have a problem when I'm releasing the clutch slowly .. there's couple of things that might be the problem but it's almost kind of a rattle I wish I could send you a video of it

[@notoriginalgamer]

hi. i have a question ,i want to make a swap to my e46 316i sedan facelift 2003. i want use a engine from a 325i. i have the 325i car but is crash it`s hard to put in ? i need to make modification ? or is plug and play? (sry for my bad english )

[@hiter3]

google short links dont work

[@JA-il3kd]

Appreciate it. Videos are very helpful. Godbless

[@rmasco71]

Can I just spray starter fluid in these areas and listen for higher RPMs? I’m pretty fckn lazy

[@MarcusLeon92]

Four years later and you're still so good to me!!! Thank you ShopLifeTV.

[@engelbertmaier2853]

I live in Germany near munic. I love your DIY Vids from the USA. You Americans make much more Videos about BMW than we Germans. You and 50s Kid are the very best. Keep on to the very good and very helpful work. Thank you very much from good old Germany!

[@razorrich]

Fantastic M54 Vacuum Codes Diagnostic vid. Far better info here than all the E46 forums, LoL!

[@DennyBalance]

Lot of them forum boys are stuck up and useless

[@johndee408]

Literally love this guy the most thorough and helpful videos.

[@ej1jayk]

After countless hours of searching online and messing with my e46 I finally got rid of p0171 and p0174. Problems I had were all small vacuum lines were dry rotted, valve cover gasket and disa gasket needed to be replaced, intake boots were cracked, fuel filter was clogged, and the ccv lower oil vent hose was broken. After all that and two drive cycles I got all monitors ready with no codes. I noticed it’s easier to set monitors when using cruise control than by trying to hold a steady speed with your foot.

[@scottiepipppen8933]

Damn bruh i hope this isnt me lolol currently figuring it out on my e39

[@roberttarring8621]

Just come up on mine changed the lower intake pipe as It was split the codes still There 😮 hoping it’s just the oil Filler cap 😂😂😂

[@eastsideofthetracks8311]

@@scottiepipppen8933 most likely all vacuum lines are dry rotted bye now I’m currently replacing all of them on my e46 idk about the valve cover tho mines is leaking but I doubt it’s causing a code

[@scottiepipppen8933]

@@eastsideofthetracks8311 mine has a small leak, monitoring it have not changed it, believe it is my hoses as well they do look dry rotted

[@eastsideofthetracks8311]

@@scottiepipppen8933 change them bro I recommend just removing the whole intake manifold to replace ccv as well way easier to replace everything while that’s out 💯 i did all that but still have vacuum leak codes +radom misfire idk what else it can be 😂

[@zefbreaks]

I've owned my E46 for about a month now.. just got an engine light and scanned both of these codes. ShopLife rocks!

[@robertwalker7010]

I put my bikes together as a kid your channel has me wrenching my BMW the dealer prices were a hell of a motivator to. Keep it up 👍. Subscribed

[@danbentley6779]

Top work Jason, I’ve been watching from the start and your videos are just getting better and better. Your presenting style is now really fluid and you go in to the intricate detail required for the global BMW community - hats off to your Sir , your hard time and effort is really paying off..... keep it up and you will go far!

[@ShopLifeTV]

Thanks for the feedback! Glad the video helped!

[@AlmaPierce]

Thanks for this and all the other helpful videos! Your E46 diy tutorials are the best and have helped me fix a salvage pos 2001 325i nightmare that someone conned my mom into buying and rebuild it into an actual decent and reliable daily driver that passes smog. It’s starting to look better and run smoother every day and we were able to pull this off on a very minimal budget. Note that I am a 5’2” tall 110 lbs female with pretty good hands but no formal training in mechanics. If I can do it, anyone who isn’t lazy and follows good instructions can as well.

[@lj7410]

somthin reeeeaalllll sexy bout a girl holdin a pair of channel locks with axle grease on her face !!!

[@mukhtarp9218]

@@lj7410 what a weirdo u r. Just give her kudos for working on the car. No need for that pervy stuff

[@jtanderson2106]

You are my hero alma ❤️❤️

[@ballistic02]

@@jtanderson2106 You are my hero JT

[@julioleal5773]

I concur, Ive restored 5 so far I currently maintain a 2000 328ci and a 2004 330ci that I rotate out for daily driving......these "mentore videos" I call them have made me into a mid level mechanic at 47 now 51 years old. On cars I always wanted since my 20s 30s...... I lost my fears of used up classics thanks to Jason Shop life and the like!!🏎🚀🎸🎥😄 now onto checking everything I learned tonight!! TU SL❤

[@Saldanga007]

I still didn’t figure it out my 5 series P0171 code, but your video is one of the best on this issue on KZbin great job

[@billjoyce7464]

You saved us a few hundred dollars. Your point that most of the causes of these codes is loose connectors around the air intake pointed me in the right direction. Turned out to be a hose where the clamp was never tightened. Great video - thanks for sharing your knowledge!!!

[@ShopLifeTV]

Awesome! Glad the video helped you!

[@Alex_Edits85]

Thanks for all your videos .. makes me work on my e46 with confident and save me lots of money .. thanks again man

[@althomas5735]

Excellent video! An automotive diagnostic smoke machine is your best tool for finding these leaks. Disconnect the boot from the MAF and send smoke through the boot. This test the entire intake system and will show any gross leaks easily, although it may not show all vacuum leaks. Also know a dirty or aftermarket air filter esp on an E83 X3 with M54 can also cause lean mixture faults. And don't forget the fuel filter. Good fuel pressure doesn't necessarily mean good flow.

[@tki_detailing]

Thank you this helps a lot as I have a e39 520i it’s giving me a lot of problems at the moment with vacuum leaks

[@epicnoise206]

This was posted JUST at the right time for me...the dreaded P0171 and P0174 (with a P0313 for good measure). Hearing the whistling on the driver side on acceleration. Figuring it's the intake boots, which will be replaced as soon as they arrive from FCP Euro. Thanks Jason!

[@chasebenford6760]

Mines doing that same thing. Did you figure it out

[@alexg8460]

Anyluck guys?

[@shanemcmahon6364]

thanks for looking out shoplife..appreciate the content was well needed👍

[@aor3200]

Very good video and it covers all normal E46 M54 vacuum leak spots. Too much people around who look fault codes "oxygen sensor deviation limit" etc.. "hmm, must be oxygen sensor"..

[@robertvel2462]

great video very well explained thanks Jason

[@jacobstock3113]

Can you do more 03-05 325XI videos? Your videos are by far the most useful for a KZbin taught rookie mechanic like myself. I hit a deer in my car and can’t let this car go.. It has a ton of problems but your videos have helped me get a lot done so far. Where I am located in Montana, I have not been able to find a mechanic worth his salt out one that doesn’t use the bmw logo to his financial benefit so your videos are pretty much my only hope.. thank you for your service!

[@hakeemg6433]

Are you a mind reader or something? This code just came up on my car an hour ago 😂😂😂😂. Perfect timing

[@markhamilton8681]

Outstanding video, very informative and well spoken. Keep up the good work!

[@JAETEKHONDA_ACURA]

Great information, appreciate how you explain everything thoroughly.

[@rogerevans5040]

This video is excellent. Thank you for the great video!

[@exoticbeard8953]

It's really helpful that you explain all the possibilities. That way i can easily eliminate the things i know are not going to be it thank you.

[@robertwalker7010]

Best bmw mechanic on KZbin 👍👍

[@androidery1999]

Exceptional video. Top notch explanations. I'm chasing a P0174 with my 03 325xi and this will definitely help narrow it down! I'll be following.

[@louistoscano3830]

Nice vid. Very very specific compared to other 53 engine p0171-p0174 codes. You rock! Keep up good work

[@vmoutsop]

Great episode, especially good to know this when buying a (new) used e46 and what vacuum lines should be checked or replaced once you have the car.

[@neb-co2cs]

Thanks for sharing this very informative video. Keep up the good work Jason!!!

[@ShopLifeTV]

Thanks man!

[@TheLongboarder77]

Brilliant video man - you are a serious E46 dude. Thanks man. I will be subscribing!

[@whichdoctor4858]

Best vid so far for this M54 fault.

[@ericarevalo7803]

Great FYI video. Question? Do you recommend using a smog machine to find vacuum leaks? Have you used one before? Thank you.

[@alexmorgan3819]

thanks to you I fixed a vacume leak at disa valve big o ring.

[@TiminNFL]

Kudos! Incredibly helpful video! Thank you very much.

[@OneHumanPOV]

Thank you for this video. It just helped me out significantly. Thank you.

[@jesusborrero3382]

Thank you for the excellent explanation

[@jeromeestrada6366]

You’ve saved me so much money, I can’t thank you enough!!!!

[@a_true_generic_gamer1104]

DISA VALVE! You're an actual angel I've been trying to figure out what the hell that damn thing was, and I finally know. I'm 90% certain the o ring for mine is worn out, so now I know what to look for

[@angryambulancedriver2654]

Hey Bud, first of all thank you for sharing your info. I'm trying to get my 2000 328i ready for spring and just pulled several codes P1510, P0170, P0173, P1189, and P1188, did a live data scan and getting deep negative numbers ( example bank 1 is at -18) any ideas what I should be looking at? I'm replacing fuel filter, regulator, and O2 sensors. Trial by error I guess

[@ericz3822]

Thank you! Great video. Question... I have a presumed vacuum leak and on the old manifold where you point out where the intake air temperature sensor goes, I noticed I do not have a sensor there, but rather a plug that is the same shape as the sensor with an o-ring. The "plug" is cracked and warn. Do you know what the "plug" is called? I cannot find a part number or name anywhere. Thank you again!

[@johnlivingston907]

I love these videos! so informative. Thanks shoplife you are a beauty👍🏻

[@DA-qu8zr]

Great video which helps me troubleshoot my code issues in simple layman terms (awesome). If you could do a video on codes P0491 & P0492 and the common issues related to those codes would be very helpful too. Thanks

[@TheAutoCreative]

Thank you for a very informative video .. a very helpful video indeed

[@kentpayen8848]

I love your video great knowledge ☺️..Maybe you can guide me or any advice..03 bmw x5 3.0..code p174 and 171 I narrow the issue to the o2 sensors especially bank 2..barely reading..if I'm going down the hill without hitting the gas. All the o2s will read zero..once I stop only bank 1 will read correctly..where is the o2 getting signal from...any advice please

[@omarortega3717]

Noticed myself watching a lot of your videos realized your my hero so I subscribed love you bro thank you

[@ShopLifeTV]

That's awesome! Glad I could help

[@bettykent426]

Appreciate it thank you for all detailed info.

[@MS-vk2jp]

Thank you for this! Very helpful

[@gmbaboon4025]

At 9:00 When I have a Cold start I do hear the hissing sound but once engine has warmed up it goes away. Is this the same issue to replace my break booster?

[@user-xv1ld9qr1z]

Awesome videos. They have helped me so many times.

[@DavidBarrentinemusic]

Great information. Thank you very much.

[@vegale1]

Great information Im having the code P0174 in my z4 2003 do you have videos for this car?

[@kiry2099]

Great video on e46 325i. I replace small vacuum hose in the back intake connects to secondary pump on the side by headers do I need to reset check engine? Also when I have on P rpm llittle up and when on D goes down between the O and 1 pretty much in the middle when on D but wen on P tiny niddle goes up ?

[@JoseFlores-uk6pq]

Excellent! Good information!

[@user-ub5rg6fn6e]

Awesome as hell. Well done and so informative!!!!!

[@ShopLifeTV]

Glad it helped!

[@Surjnarine1]

Hey, can you cover or explain what causes the P1191 and P1193 codes? I have the dreaded P1193 and I replaces many things but it won't go away.

[@H41STO]

Your videos are amazing mate, really appreciate your help. Would fitting an aftermarket intake cause vac leak codes??

[@scottsenjo2057]

Excellent video. Thank you.

[@kevinmonaghan3247]

Cleaning throttle body,I did what you said to just clean around the sides ,not to mess with flap. Well I took it out again to replace manifold and noticed throttle body center was moved.gow do I recalibrate or do I have to replace.thanks for all videos come in handy

[@rasmusen67]

Thanks for this video and all the other helpful videos.. This is sooo helpful...

[@ShopLifeTV]

Glad to be able to help!

[@chekizz28]

Great explanation

[@joes.1945]

Great job, very informative!!

[@ShopLifeTV]

Thank you!

[@jtx0512]

Thanks for this awesome vid! I have the same issue on '15 BMW X1 and my BMW dealership performed a smoke test which they said found no leak. But they identified the following issues; 1) There is a leak in crankcase system and recommended to replace front crankshaft seal and b) found oil leaking from vacumm pump. Do you think these could be the reasons for the P0171 code? I took my car to my local guy and they said most likely these are irrelevant to the engine code and won't make the sign go away. Would highly appreciate your insights on this matter.

[@Shane-yj4cn]

Awesome clip! really useful. Thanks

[@adycooke5925]

Hi nice information. Would a Vanos solenoid cause a fault? My E46 340ci has 150000 miles on the clock. I have replaced just about everything on it now and it comes back with this fault.

[@randyvargas809]

love that video i have a 02 bmw 330i it just went in to limp mode for that transmission i was wondering if u know how to fix it thank you

[@anthonysimpson6903]

Randy Vargas there’s a chance the gearbox or the transmission could be out of fluid would cause the limp mode to activate if the car will rev in drive but won’t move like it’s in neutral .... just turn the key ignition too the second position and press the throttle till u feel that click... hold that for 30 seconds that will reset the transmission too factory

[@gilmore357]

@ShopLifeTv at 11:08 in the vid you mentioned the black and white "switches" towards the back of the manifold, where could I purchase this part? Is it crucial? It's completely missing on mine. I have a 2004 330i US

[@jimrodgers7042]

Excellent video. Thanks

[@Goaheadandtry]

great overview- thank you. I have a question: Could the vacuum leak cause P0128 code on 2007 335i? I've replaced thermostat, water pump and the coolant temperature sensor but the same code came back a month later. - Thanks to all who may help!.

[@tallerguanaco9485]

Hey bro nice video. Thanks for the info. I’m wondering if you can talk about the code p2098 please.

[@SirFrancoQ]

Brilliant video! Thank you mate!

[@ShopLifeTV]

Glad you liked it!

[@tommaillard1415]

What could cause power issues along with these codes out of everything? I know the disa could be one, and the general system running lean, but which failing system would result in power loss?

[@gail6904]

i love ur videos thank u any way to check to see if PCV valve is bad on 2008 328i sedan?

[@JMUDoc]

Just took the plunge and investigated my lean codes - the intake boot to the throttle body/ICV was torn. Absolute PIG to remove, thanks to the kind BMW engineer who installed the hose clips facing INTO the bulkhead.

[@alexb1310]

My p0171 and p0174 codes were triggered by the DISA valve flap armature (white hollow lever under the small black triangular cover) that snapped and since its hollow on the inside was letting enough vacuum by to trigger the codes. I'm shocked since the hole was only 3mm in diameter but it did trip the codes and made the idle stumble a little.

[@DjNvs]

Any guesses as to what could be my issue? I have a 99 E46 328i. Every few weeks I’ll get a check engine light due to a misfire. It seems to jump between cylinders 2, 3 and 4. Mostly 2 and 3 though. Tried to move my plugs and coils around to see if the issue follows. Seems to stay within the same cylinders all the time.

[@mihailjawad7199]

Hello, I have the same codes but I was told that it may be the O2 sensors, can you tell me hiw can i diagnose an O2 sensor and also a MAF sensor. Thank you!

[@user-dh8dx7jc1d]

A very helpful video, thank you! There is one question left for me: At 11:35 in this video there is a pretty good view to the bottom of the intake manifold, showing 2 hoses connected to it. The left one (the thicker one) leads to the break booster (via jet pump). What about the smaller hose, right next to the thicker one: Where is it connected to on the other end? Is this covered somewher in your video?

[@SaynN0Less]

wow this code literally just popped up on my e46 this week smh, notification gang btw 👊🏽👊🏽👊🏽

[@ethiopianeyes]

I change my intake boot and cleared codes all good. Check for cracks in boot before you do ccv

[@Z4loorit]

Hi Jason, great vacuum leak video. U seem very knowledgeable so hopefully u can answer my question. Z4 e85 05 2.5 revs rise from 900rpm idle to 1200rpm when I press the brake pedal. Booster fine, idles smooth and runs perfect. No lights on at all. Will stay at 1200rpm until I release pedal. Cheers in advance....... Tim

[@louiesaltos6147]

I m about to use cigarette smoke to detect the vacuum leak as soon as I have time off. There was a leak in one of the hoses n I fix it by using gasket maker after 2 days it was well seal. More leaks now on myZ4. Thanks for your worthy n valuable information .

[@pctuterman1]

Lots of good info. I just joined your channel. Have a 2001 BMW M54 E39 with a vacuum leak I can't find. Will look in the places you illustrated. Thanks. Hope to find my leak.

[@jonathanclark6489]

Awesome video thanks!

[@ricardofogel671]

Nice detail, thanks

[@simplelangperorock]

Hi, great video. Do you know how to fix code1339?

[@thetube4424]

How many tuc tucs has this guy fixed...great vid.. do a vid on m62tu

[@bxtrclrk1710]

This is one of the better videos on this subject, but it too fails to mention a pretty common source of the vacuum leak. On the underside of the intake manifold, pointing to the rear, there are three nipples that are used as attachments for vacuum lines on some BMW models but not others. On many models, the nipples are covered by rubber caps. With time and heat the caps can crack and leak, or even fall off, thus creating an even bigger leak. Check these first. If this is the problem as it was on mine, it is a 5 minute $0.50 fix.

[@ismailhasan4813]

Hi Jason. I have a P1013 error code in my car with the check engine light. But the car runs fine. No issues. Any insights?

[@elbassaraghii5744]

Your a great 👍 teacher thanx 🤓

[@orangexxxx3140]

Think 2 more common issues for p0171/74, are vacuum leak at vaccum distribution tube and also clogged fuel filter. I know this was just a quick video and your cover pretty much everything. Anyways thanks for the video and all your other videos.

[@wildguth]

Should the vacuum switch in the back of the intake manifold leak during a smog test?

[@likits1999]

Hi Jason, have you ever encountered a P1092 lean code on a 2001 330i? Thanks in advance!!!

[@jonathanv4883]

So when you checked your pcv system 3:27 is there naturally still supposed to be a slight vacuum or is a slight vacuum and indication my system is bad

[@redline6166]

Shoplifetv could these codes also come up if the oil filter housing o ring is leaking pretty bad.?

[@AndreGTunechI]

Y do ppl waist there time to click thumbs down smh.. they not better. Shoplife knows his stuff.. keep up the good work.

[@ShopLifeTV]

Thanks man!

[@AndreGTunechI]

@@ShopLifeTV hey bro I have an issue with my e46, I can't seem to figure out this noise like air being forceful instructed, that caused my fan to completely broke off n burst up my radiator. I jus did all the necessary replacements but still the sound exist.. could it be my water pump/ pulley...??

[@bogusienombre355]

Cause obviously they don't get their question answered. Their frustrated. Go to the BMW forums for responses to your questions.

[@tommaillard1415]

GREAT VIDEO thank you

[@shareesesimpson6255]

hi my ck engine light been coming on and off for about 6 month. ck code and running lead. so what should i ck first? i'll probably replace disa ring?

[@MS-vk2jp]

Thank you! I'm also pulling codes 00003D, 00002A, 00003A (using Carly) Do you have any videos on the central chassis electronics? I have a 2002 330 XI

[@mike.135i]

can u check all the hoses buy spraying soapy water solution on them while car is running? or does it not work like that?