You don't need to replace it. Just take it out, open it up and clean it. There's a plastic gauze in it that gets caked with air particles that won't let air through. The sensor cost 100 US so fuck that i cleaned mine and it worked fine. Opening it is a dremel cut, then glue it back together. Takes an hour.
@Jon Rod I agree. In my experience, the "your cheap" slight typically comes from someone who somehow feels threatened that someone else easily fixed something that they paid $100 for. To compensate, they lash out and try to knock the ingenuity in others that they dont have themselves.That and many people are just mindless consumers. It's ironic because OPs comment literally is what made this entire video useful.
Mine has pretty much not been working for the more than 6 years I have had my E61. Btw. it's only potentially being used by the car when you have the air re-circulation in A- mode *automatic*. In this position the car will take air in from the outside until it senses the air is sufficiently polluted - then it switches automatically to re-circulation. So not a big deal unless you travel a lot in areas with a lot of pollution, there it will come in handy.
can i check the wiring itself on my bmw 730d rear centre right as have defined the problem is the wiring as the other three work perfectly with new sensors in place
I study the EGR removal for my bmw N47 e87. There are so many opinions on this subject and so different ones. Some say the engine will get too hot by removing it and will result in long term wear. Some recomend removing (you also as I see). I am not convinced what to do..
Hi mate. I have a CEL on and codes I have are 801225 , 801224 and E71439. What may be causing this, just had air con recharged but still have light on.
Mine was broken without error code. Just lost its sensitivity. In F30 3 series you can hear it very well if it switches into recirculation mode. One day i wondered why i didn´t hear the recirc noise for a long time, so i started to investigate and tested the sensor by letting my gasoline brushcutter blow some exhaust on it while reading the AUC sensor data with OBD. Showed almost no reaction. After replacing the sensor i repeated the procedure, the new sensor reacted immediately and switched into recirc mode. The new sensor has a "02" version index on it, so i hope BMW optimized it to last longer than the original "01" indexed version.
Does this sensor have anything to do with the oil sensor and engine tempeature guage going up? Have changed all parts on my F10 but still car gauge is going slightly high on long drives
would this sensor tell the computer diagnostic it has 0 pressure? I have changed the high low pressure valve 3 times, the gas is charged and with pressure but it doesnt detect the pressure so the compressor never turns on
All this does is automate the Recirculating valve for the cabin air. thats it. you dont HAVE to change it. you can manually select recirc in the cab by the controls. replacing it is more to get rid of the constant error it gives. Why that thing costs so much is anyone's guess.
It will not show in the cluster, or in a generic obd2 reading. I use bimmergeeks software to read codes that you would normally need the dealer (or the$4000 - $9000 reader from snapon).
@@emilyhofland8219 yes it does and if it doesnt get a better one any generic obd2 has the capability of reading the auc sensor lol im literally staring at it as we speak both my cars need a new one
@@801russc I used the app called bimmercode to code always recirculate as default on startup its available foe Android or IOS. Or you can have any coder do it.
@@boistoys5451 1st I'd like to thank you so very much for responding so quickly, especially on a year old post, (mine was today lol, for those who are confused) What production model do you have or had? I've got a 2014 F30 335i, I've tried to code out auto recirculation with Bimmercode, Diagun iv & v and a few different ways with a laptop and have yet to successfully find anything that keeps it from "stinky, toxic, polluted so called fresh air"... Not being able to lock air recirculation for as long as I want will be the only thing preventing me from buying an New 340 or a used X6M next year, sadly this one thing has made me start looking at Audi S3's and hardtop boxters (can't remember the name of it). Anyway thanks again Bois....
Hi George, my wife is pregnant and we have found she has high carbon monoxide in her body, we have since had a carbon monoxide tester in our car and it is entering the car. Bmw 1series 120d 2014. Could this sensor be the answer? Or is it likely to be from somewhere else. Seems to be entering through the vents. Thanks in adavance
Hi, you mention this sensor should limit noxious fumes/gasses , when my 2010 e91 318d is idling I seem to get a faint exhaust smell in the cabin , would this be anything to do with this sensor ?
I have a question I put the computer on my car and the code was 9C54 AUC sensor... the question is. Can that sensor affect the cooling fan of the car??? Because it turn off and the car start saying high temperature and air conditioning start throwing hot air then suddenly the car start shaking when AC tries to turn on when car is on the move.
I had an eggy smell coming from my heaters a week ago but only smelt it for two days then after that it seems to have dissapeared as I’ve not smelt it since could this be the sensor or something else?
Zoe Balbaert my battery is only 1years old and its in trunk an the smell come from heaters only for two days I haven smelt it since this was around 1 month ago
Mine looks like the sensor got cut off😂 I only have the wires left. Because I removed the cowl cover permanently, so I had to leave that sensor dangling. But my 335i runs just fine 🤷🏻♂️
i hawe normal hot air on top litle hot air on botom and COLD air on mid and i cant chance that to by hot or kold car is always on this air atance someone can tel me what i do to repair it car is BMW 2006 E60 530d 231hp i hawe cod on rhis sensor i replace it but nothing
So, I've replaced this sensor with junk yard sensors, new sensors, and even took one from a friends car who didn't have the code... and I still have the code... Any ideas?
@@GeorgeAusters I did from FCP euro. And when I put it in my car, I still have the code. I put it in my friends car, he doesn't have the code. I take his and put it in my car.... I still have the code. Could code 9c5f have anything to do with it?
@@GeorgeAusters prefer the £50 over an error code which doesn’t really make a huge difference to the ordinary driver Now if it’s producing a fault on the cluster then definitely it’s an error worth fixing, but this one wouldn’t. I once had a car with 98 error codes before I wiped them, bmw 640d… it drove like a dream!
![Twenty One Pilots - “The Line” (from Arcane Season 2) [Official Music Video]](http://i.ytimg.com/vi/E2Rj2gQAyPA/mqdefault.jpg)
i changed it only recently, and it was my last error code, now the car is in perfect shape.
Good to hear!
So clear in all his videos, delighted to watch, highly recommend
You don't need to replace it. Just take it out, open it up and clean it. There's a plastic gauze in it that gets caked with air particles that won't let air through. The sensor cost 100 US so fuck that i cleaned mine and it worked fine. Opening it is a dremel cut, then glue it back together. Takes an hour.
If you want to be cheap then by all means try and repair it
What should I clean it with?
@Jon Rod I agree. In my experience, the "your cheap" slight typically comes from someone who somehow feels threatened that someone else easily fixed something that they paid $100 for. To compensate, they lash out and try to knock the ingenuity in others that they dont have themselves.That and many people are just mindless consumers. It's ironic because OPs comment literally is what made this entire video useful.
i did same thing on my e66
A bit less than gentlemanly there George.
Why do I need to replace it? 🤷♂️
I got this code could this lead to service engine soon light and increased emissions ?
Mine has pretty much not been working for the more than 6 years I have had my E61. Btw. it's only potentially being used by the car when you have the air re-circulation in A- mode *automatic*. In this position the car will take air in from the outside until it senses the air is sufficiently polluted - then it switches automatically to re-circulation. So not a big deal unless you travel a lot in areas with a lot of pollution, there it will come in handy.
I don't like anything not working on my cars haha!
You are just losing my time to watch that an idiot video . Please choose the right topic to your video 😡
I have an error ,9c54-ihka auc sensor,is this the one you talking about right??
can i check the wiring itself on my bmw 730d rear centre right as have defined the problem is the wiring as the other three work perfectly with new sensors in place
What code were you getting for this?
Thanks I just had the fault code come up on my 330d
I study the EGR removal for my bmw N47 e87. There are so many opinions on this subject and so different ones. Some say the engine will get too hot by removing it and will result in long term wear. Some recomend removing (you also as I see). I am not convinced what to do..
Just know that the EGR will always cause problems. With it removed, it’s one less thing to worry about and your engine will thank you for it👍🏻
you are a clown if you remove it you're going against the manufacturer who put it in the first place
Hi mate. I have a CEL on and codes I have are 801225 , 801224 and E71439. What may be causing this, just had air con recharged but still have light on.
Mine was broken without error code. Just lost its sensitivity.
In F30 3 series you can hear it very well if it switches into recirculation mode. One day i wondered why i didn´t hear the recirc noise for a long time, so i started to investigate and tested the sensor by letting my gasoline brushcutter blow some exhaust on it while reading the AUC sensor data with OBD. Showed almost no reaction.
After replacing the sensor i repeated the procedure, the new sensor reacted immediately and switched into recirc mode. The new sensor has a "02" version index on it, so i hope BMW optimized it to last longer than the original "01" indexed version.
Interesting!
Does this sensor have anything to do with the oil sensor and engine tempeature guage going up? Have changed all parts on my F10 but still car gauge is going slightly high on long drives
No
Exactly what problem are you facing? Did you clean your radiator?
would this sensor tell the computer diagnostic it has 0 pressure? I have changed the high low pressure valve 3 times, the gas is charged and with pressure but it doesnt detect the pressure so the compressor never turns on
My BMW keeps alarming intermittently when parked. Is there a video that shows how to check all the sensors on the BMW?
All this does is automate the Recirculating valve for the cabin air. thats it. you dont HAVE to change it. you can manually select recirc in the cab by the controls. replacing it is more to get rid of the constant error it gives.
Why that thing costs so much is anyone's guess.
thank you but what this sensor supose to do when it detect toxic smells etc ? you dont explain this importatn part on your video. :)
Hi, one link for the tester pls?
Where is AUC located in 528i N52 2010? Pls your support
Same place
I haven´t got that sensor at all in my -04 BMW 520i
You’ll have it on your radiator fan
THNXS!
Handy vid mate
Cheers Ron!
When do you know it needs replacing or will it show in the cluster?
It will not show in the cluster, or in a generic obd2 reading. I use bimmergeeks software to read codes that you would normally need the dealer (or the$4000 - $9000 reader from snapon).
@@emilyhofland8219 it will show in a generic ob2 for bmws
@@dflex4180 not the auc sensor. I checked.
@@emilyhofland8219 showed up as a fault on mine using Veepeak and an app
@@emilyhofland8219 yes it does and if it doesnt get a better one any generic obd2 has the capability of reading the auc sensor lol im literally staring at it as we speak both my cars need a new one
Thanks a lot brother
Allah bless you
It's my pleasure
Hey man to do know what the sensor on the same spot but opposite side is for ?
Hood release switch
@@GeorgeAusters thanks man
Hi once we changed the auc sensor do we have to clear the code to make it work?
No
Good video 👍🏼
Thanks 👍
whereis this AUC. sensor. located at ?
Did you watch the video?
2015 bmw f10 outside temperature reading low ! What’s the problem if I changed sensor already?
It’s cold outside
I coded my ventilation to always recirculating. So I don't have to worry about that sensor. I would change it if I had an error code though.
OMG what is the coding for it, I can't find anything that will work on my F30
@@801russc I used the app called bimmercode to code always recirculate as default on startup its available foe Android or IOS. Or you can have any coder do it.
@@boistoys5451 1st I'd like to thank you so very much for responding so quickly, especially on a year old post, (mine was today lol, for those who are confused)
What production model do you have or had? I've got a 2014 F30 335i, I've tried to code out auto recirculation with Bimmercode, Diagun iv & v and a few different ways with a laptop and have yet to successfully find anything that keeps it from "stinky, toxic, polluted so called fresh air"... Not being able to lock air recirculation for as long as I want will be the only thing preventing me from buying an New 340 or a used X6M next year, sadly this one thing has made me start looking at Audi S3's and hardtop boxters (can't remember the name of it). Anyway thanks again Bois....
@@801russc I have 2014 X5 Diesel, and 2002 E39. Both coded to have recirculating as default.
I’ve got a bonnet light that keeps coming on saying it’s opened when it’s not. Could it be because of this sensor?
No it’ll be the bonnet switch
@@GeorgeAusters thank you
Dude you got any vids on the exhaust back pressure sensor?
Hi George, my wife is pregnant and we have found she has high carbon monoxide in her body, we have since had a carbon monoxide tester in our car and it is entering the car. Bmw 1series 120d 2014. Could this sensor be the answer? Or is it likely to be from somewhere else. Seems to be entering through the vents. Thanks in adavance
This will sense bad air outside and turn on automatic recirculation
Another great tip
Glad you liked it
Thinks for the vid
Welcome mate!
Jai un code erreur p1278 330d e92 cest quoi le problème?
What program are you using to check the codes?
ISTA+
Hi, you mention this sensor should limit noxious fumes/gasses , when my 2010 e91 318d is idling I seem to get a faint exhaust smell in the cabin , would this be anything to do with this sensor ?
If only all jobs on these was this easy
Honestly hahaha!
I have a question I put the computer on my car and the code was 9C54 AUC sensor... the question is. Can that sensor affect the cooling fan of the car??? Because it turn off and the car start saying high temperature and air conditioning start throwing hot air then suddenly the car start shaking when AC tries to turn on when car is on the move.
sounds like a bad ac pump
My 325i did not have this sensor. Can this cause the battery to discharge?
Answer please bro
هل يوجد في e45 موديل 2000 و اين يوجد
I had an eggy smell coming from my heaters a week ago but only smelt it for two days then after that it seems to have dissapeared as I’ve not smelt it since could this be the sensor or something else?
Battery
Zoe Balbaert my battery is only 1years old and its in trunk an the smell come from heaters only for two days I haven smelt it since this was around 1 month ago
@@joshcatalano5127 oh ok must be airco vent then
Dead animal in the cabin filter? This sensor going bad will cause you to smell things, under the hood. ... But, it won't cause any specific smell.
@@emilyhofland8219 u kno your stuff ma
Smashing it mate
🙌🏼
Fair video mate but the part and function is only valid with AC switched on
Yep still a very common fault though👍🏻
Always better once they've bounced of the floor
Hahaha!
Mine looks like the sensor got cut off😂 I only have the wires left. Because I removed the cowl cover permanently, so I had to leave that sensor dangling. But my 335i runs just fine 🤷🏻♂️
Would this be a reason why my 08 e90 ac keeps turning on?
When does it turn on?
@@GeorgeAusters just moments after I turn it off it'll come back on like it got a mind of it's own
ive replaced my senzor but still have the fault code
i hawe normal hot air on top litle hot air on botom and COLD air on mid and i cant chance that to by hot or kold car is always on this air atance someone can tel me what i do to repair it car is BMW 2006 E60 530d 231hp i hawe cod on rhis sensor i replace it but nothing
goood
Awe the sensor I just broke on accident xD
Why do you NEED to replace it? It is only used if you use automatic air recirculation. Just a bait title? sigh
You need to replace it if you want your car error free👍🏻
@@GeorgeAusters so in other words, you don't have to, and its an attempt at a bait title. Got it
George my sniffer sensor I call it 🤣 mibe us missing or else deleted 🤔
So, I've replaced this sensor with junk yard sensors, new sensors, and even took one from a friends car who didn't have the code... and I still have the code...
Any ideas?
Need to buy new
@@GeorgeAusters
I did from FCP euro. And when I put it in my car, I still have the code. I put it in my friends car, he doesn't have the code. I take his and put it in my car.... I still have the code.
Could code 9c5f have anything to do with it?
@@leethompson5590 bro did you delete code? you must delete code, if it comes back then check wires.
I will replace it BUT WHEN IT WILL BROKE!!
Say what
👏👌
🙏🏼
Saiuriu saiuriu raise vasar
Again yoga's uarmniu 🚕🚖🚕
you shud mention purpose of this sensor at earlier of video. gaining ur watch time wasting our times
Not worth the the money to replace this ...£50 down the pan IMO
Depends if you like error codes or not
@@GeorgeAusters prefer the £50 over an error code which doesn’t really make a huge difference to the ordinary driver
Now if it’s producing a fault on the cluster then definitely it’s an error worth fixing, but this one wouldn’t. I once had a car with 98 error codes before I wiped them, bmw 640d… it drove like a dream!
It's great that you told us why it is important to replace it... Not!🫣 But at least you showed us how instead.
Do you understand English? The WHY is because it can let chemical/toxic smells in the cabin if it's not functioning 1:35
@@JamarRosalesbut mine is functioning
@@GTFour I acknowledge your troll comment 🤣👌
it's a 1 series , mine is 740 ...
It's the same thing that sensor.