Anyone with BMS intakes throwing CEL

[AWF10M5]

I put in my BMS intakes. The install is easy a shop did it nonetheless and within 40 miles I had a CEL for mass air flow sensor 2 and some air mass 2.

109201 Air mass 2 plasbuility
102A11 Mass air flow sensor 2

I didn't want to drive back so I reset codes and this morning the CEL came again for only 109201 Air mass 2 plasbuility.

I reset codes again and rechecked install and reinstalled the MAF on both sides everything looks good locked in and secure.

I was told it could just be my car since I have zero mods besides this.

These sound so good and look mean in the engine bay. However I do not want to drive around with a CEL. I am hoping it adapts or something if not i will unfortunately return them.

Anyone else running these didn't find any videos or anything

[steeve13m]

Originally Posted by E63amg

I put in my BMS intakes. The install is easy a shop did it nonetheless and within 40 miles I had a CEL for mass air flow sensor 2 and some air mass 2.

109201 Air mass 2 plasbuility
102A11 Mass air flow sensor 2

I didn't want to drive back so I reset codes and this morning the CEL came again for only 109201 Air mass 2 plasbuility.

I reset codes again and rechecked install and reinstalled the MAF on both sides everything looks good locked in and secure.

I was told it could just be my car since I have zero mods besides this.

These sound so good and look mean in the engine bay. However I do not want to drive around with a CEL. I am hoping it adapts or something if not i will unfortunately return them.

Anyone else running these didn't find any videos or anything

pull your two MAF sensors and clean them with CRC MAF cleaner every 10k miles

[MpowerMike]

Nope

[DaveCM5]

I would check to make sure the shop seated the connections to the MAFs properly and check to make sure they tightened the hose clamps. The “plausibility” makes me think you have a slight air leak. The leak would be between the MAF and the engine. I think it’s saying it believes more air is entering the engine than the MAF is measuring.

[AWF10M5]

I will have everything rechecked and reclean the MAF and report back.

[allmotor_2000]

It can occur - clean your MAFs and reset adaptations

[AWF10M5]

Taking out MAF and cleaning MAF the car is idling rough and jumpy. After a short drive it died twice.

I checked everything and all looks snug and well. Connections good MAF good. I cleaned it again.

Car is running rough smells like fuel got codes ecu 2 bank over Cross and lambda adaption.

I used crc cleaner prior to this car aas running fine.

Did the sensor die from the cleaning?
Can any damage be done by driving car in this condition while I wait for new maf,?

[Herofmine]

Originally Posted by E63amg

Taking out MAF and cleaning MAF the car is idling rough and jumpy. After a short drive it died twice.

I checked everything and all looks snug and well. Connections good MAF good. I cleaned it again.

Car is running rough smells like fuel got codes ecu 2 bank over Cross and lambda adaption.

I used crc cleaner prior to this car aas running fine.

Did the sensor die from the cleaning?
Can any damage be done by driving car in this condition while I wait for new maf,?

On BMWs you can not use MAF cleaner, it will kill it.

[AWF10M5]

Originally Posted by Herofmine

On BMWs you can not use MAF cleaner, it will kill it.

Well that's great what a waste of $350 lmao

Will it be okay to drive car short distance

[Herofmine]

Originally Posted by E63amg

Well that's great what a waste of $350 lmao

Will it be okay to drive car short distance

Yes you can but don?t drive too much, i am having same problem going to get new MAF sensor. My car idling ok but throwing codes and CEL is on, going to check O2 sensors too, This coming week i will update the progress.

[AWF10M5]

Most annoying part is I shouldn't have cleaned them they were fine

The intake was throwing a air code but at least car was driving and working good

After cleaning it's bad

[boots]

I have over 108k miles and have never cleaned my maf. But I always clean my filters though. Kn filters

[AWF10M5]

Yeah I suggest NEVER to use any cleaner i think the sensors have died. I just let them dry overnight and reset the battery and put them in and car idle okay at first and then real bad and smell like straight up gas.

Upon cleaning them I have had all sorts of codes, lambda, fuel mixture, all sorts of mixture codes. I also used the cleaner where the sensor slides in and on the plug.

New MAF are on the way. I hope this fixes it. What a PITA. I should have left them alone at least before the car was driving and sounding great smh.

[AWF10M5]

Same exact issue as this m3 or m4 with these bms intake

http://f80.bimmerpost.com/forums/sho...&highlight=maf

[AWF10M5]

I guess cleaning the sensors this happening was just a coincidence. I decided to clean them again and will report back. If the same issue I will just remove them and return them.

Now I am wondering if the RK or Msr non tuned cars have same issue ?

[steeve13m]

Originally Posted by E63amg

I guess cleaning the sensors this happening was just a coincidence. I decided to clean them again and will report back. If the same issue I will just remove them and return them.

Now I am wondering if the RK or Msr non tuned cars have same issue ?

Been cleaning BMW MAF's with CRC on a regular basis for years with good results....this has prevented me to have to buy new ones

[HXS]

Originally Posted by steeve13m

Been cleaning BMW MAF's with CRC on a regular basis for years with good results....this has prevented me to have to buy new ones

I second this. I've used CRC MAF cleaner on the F10 M5 sensors and they still work just fine.

[AWF10M5]

After talking to terry at BMS and reading online it seems it's a 50/50 chance if you have no issues don't touch the sensors with the cleaner.

I just unplugged both the car is running great.


My new sensors were supposed to be here today but they haven't even shipped out. Terry said it's fine running without the sensors even long term. I personally don't like that idea though.

[BinH]

Originally Posted by HXS

I second this. I've used CRC MAF cleaner on the F10 M5 sensors and they still work just fine.

Fine for me as well... I definitely didnt spray the connections though as the OP did!

[AWF10M5]

No sensors till end of this week unfortunately

Do you guys think I should avoid driving? I can leave the car parked for a week while I wait but I rather not walk everywhere lol

[AWF10M5]

My new sensors came this morning. After installing them the car was still running poor but after a quick drive and some pulls the car is idling smooth.

Mpg is going up and car feels great again.

I'm glad I was able to fix this issue.

I still highly suggest no one to use cleaner on the stock sensor. Just replace if you think you have too.

While doing my search I noticed several members had these weird MAF sensor codes and the dealer would be replacing injectors and coils and the issue would still exist. I suggest replacing the two maf quick and easy fix .

Thanks for all help guys

[pedrohbr]

Originally Posted by AWF10M5

My new sensors came this morning. After installing them the car was still running poor but after a quick drive and some pulls the car is idling smooth.

Mpg is going up and car feels great again.

I'm glad I was able to fix this issue.

I still highly suggest no one to use cleaner on the stock sensor. Just replace if you think you have too.

While doing my search I noticed several members had these weird MAF sensor codes and the dealer would be replacing injectors and coils and the issue would still exist. I suggest replacing the two maf quick and easy fix .

Thanks for all help guys

Funny thing, I was having the same codes for my car. I bought it with aftermarket intakes and that made me wonder: "what if my sensor is also disconnected?" and sure it was. Saved me a couple hundred dollars haha, thank you from the future.