M2 Comp Error Codes

MikewhitE92 · 01-06-2023, 07:39 AM

Afternoon chaps,

Not sure if this was the correct thread to use, I've recently upgraded to a 2019 M2 Competition, love the car and had it a couple of weeks now but the other day I turned it on and had an engine warning light, constantly on, rung BMW an they can't get me in until end of the month but luckily my Dad has a code reader.

Plugged it in and we get the following errors:
102901 - Intermittent - Air mass 2, plausibility air mass too high
102E11 - Intermittent - HFM (Hot Film Air Mass Meter): electrical fault of Mass Air Flow (MAF) implausible

Car seems to run fine but yesterday I pulled out into the road and it flicked itself in neutral somehow.

Any help would be great!

Cheers,

Mike

captain slowly · 01-06-2023, 11:15 AM

Has the car been modified prior to you owning it? Maybe it had intakes and the car was put back to stock and the MAF sensors weren't plugged back in fully? MAFs are not a known issue, so I would start with making sure they're plugged in all the way and I would also have a look around the intake pipes to make sure there are no vacuum leaks.

MikewhitE92 · 01-07-2023, 06:27 AM

Hi there,

Everything looks stock, pulled the MAF sensor out and checked it all over and look fine, cleared the engine codes and took it for a drive, feels a bit laggy and the engine light come back on again with the same codes again, not really sure on this one!

///393 · 01-07-2023, 10:45 AM

Quote:

Originally Posted by MikewhitE92

Hi there,

Everything looks stock, pulled the MAF sensor out and checked it all over and look fine, cleared the engine codes and took it for a drive, feels a bit laggy and the engine light come back on again with the same codes again, not really sure on this one!

Please do share the outcome. Always interested in seeing how stuff like this shakes out.

MikewhitE92 · 01-07-2023, 10:47 AM

Cleaned both of the MAF sensors again and let them sit for ages, put them back in and see how it goes, no issues to far but will keep an eye/update.

If it comes back I’ll be back down BMW to sort!

MikewhitE92 · 01-10-2023, 08:44 AM

So a little update, the car has been driving very strangely, it keeps feeling like its going to stall when I come to a complete stop and go to drive off, is hesitates and then goes and drives normally, no new error codes which is odd. BMW technician is coming to look at the car tomorrow as my BMW garage cant even get me in until the end of the month!

See what they say tomorrow and I will keep you updated

Enabled · 01-13-2023, 10:22 AM

It seems like the MAFs may be failing. Live data reading of the MAF data is important here, from both sensors.

Unless there's a piggyback system or some other tuning interfering.

Cleaning the MAF is a placebo procedure at best.

MikewhitE92 · 01-18-2023, 08:36 AM

So, cars been with BMW a couple of days now, they did the gas test and car didn’t show any leaks, MAF’s were fine - turns out on the last service the air filters were fitted incorrectly so they are now broken and was causing the air leak.

Took us to a different BMW than I bought it from as that’s where the recovery driver said to take it and they are trying to charge be £250 for the filters they’ve replaced, not even had the car a month and BMW’s error but now I have to try and get money from the BMW I purchased the car from.

See what happens!

doughboy · 01-21-2023, 03:50 AM

Air filters are before the MAF sensors so any issue with filters, broken, missing or otherwise can't have anything to do with a MAF issue?

Filters are one big air leak as they're open to atmosphere on one side. ..

MikewhitE92 · 02-10-2023, 08:38 AM

The saga continues, car still wasn’t running correctly, been picked up by recovery as refusing to drive it, they’ve had it a week and can see that something is wrong but can’t find out what so they’ve ordered loads of parts and going to replace bits and test and try.

Very long winded, when I get an update I will let you all know!

Original courtesy car was an X3M Comp but thing it’s going to be a 1 series this time now *sigh*

MikewhitE92 · 02-16-2023, 05:23 AM

Hi all,

Finally getting the car park, the whole air system was replaced including the MAF sensors which made it slightly better but rough idle was still on start up - they run another gas test and a cold early morning and turns out there was a very small leak from one of the pipes leading to one of the turbos, piping replaced and re sealed and I’ll be picking the car up later to actually check it’s fixed!

01-06-2023, 07:39 AM	#1
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	M2 Comp Error Codes Afternoon chaps, Not sure if this was the correct thread to use, I've recently upgraded to a 2019 M2 Competition, love the car and had it a couple of weeks now but the other day I turned it on and had an engine warning light, constantly on, rung BMW an they can't get me in until end of the month but luckily my Dad has a code reader. Plugged it in and we get the following errors: 102901 - Intermittent - Air mass 2, plausibility air mass too high 102E11 - Intermittent - HFM (Hot Film Air Mass Meter): electrical fault of Mass Air Flow (MAF) implausible Car seems to run fine but yesterday I pulled out into the road and it flicked itself in neutral somehow. Any help would be great! Cheers, Mike
	Appreciate 0 Tweet Quote

01-06-2023, 11:15 AM	#2
captain slowly I like turtles! 726 Rep 698 Posts Drives: '21 M2C 6MT Join Date: Feb 2017 Location: Long Island, NY iTrader: (0)	Has the car been modified prior to you owning it? Maybe it had intakes and the car was put back to stock and the MAF sensors weren't plugged back in fully? MAFs are not a known issue, so I would start with making sure they're plugged in all the way and I would also have a look around the intake pipes to make sure there are no vacuum leaks.
	Appreciate 1 MikewhitE924.50 Quote

01-07-2023, 06:27 AM	#3
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	Hi there, Everything looks stock, pulled the MAF sensor out and checked it all over and look fine, cleared the engine codes and took it for a drive, feels a bit laggy and the engine light come back on again with the same codes again, not really sure on this one!
	Appreciate 0 Quote

01-07-2023, 10:47 AM	#5
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	Cleaned both of the MAF sensors again and let them sit for ages, put them back in and see how it goes, no issues to far but will keep an eye/update. If it comes back I’ll be back down BMW to sort!
	Appreciate 0 Quote

01-10-2023, 08:44 AM	#6
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	So a little update, the car has been driving very strangely, it keeps feeling like its going to stall when I come to a complete stop and go to drive off, is hesitates and then goes and drives normally, no new error codes which is odd. BMW technician is coming to look at the car tomorrow as my BMW garage cant even get me in until the end of the month! See what they say tomorrow and I will keep you updated
	Appreciate 0 Quote

01-13-2023, 10:22 AM	#7
Enabled Lieutenant Colonel 1410 Rep 1,807 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	It seems like the MAFs may be failing. Live data reading of the MAF data is important here, from both sensors. Unless there's a piggyback system or some other tuning interfering. Cleaning the MAF is a placebo procedure at best. __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
	Appreciate 0 Quote

01-18-2023, 08:36 AM	#8
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	So, cars been with BMW a couple of days now, they did the gas test and car didn’t show any leaks, MAF’s were fine - turns out on the last service the air filters were fitted incorrectly so they are now broken and was causing the air leak. Took us to a different BMW than I bought it from as that’s where the recovery driver said to take it and they are trying to charge be £250 for the filters they’ve replaced, not even had the car a month and BMW’s error but now I have to try and get money from the BMW I purchased the car from. See what happens!
	Appreciate 1 Enabled1410.00 Quote

01-21-2023, 03:50 AM	#9
doughboy Major General 1545 Rep 8,972 Posts Drives: 2018 M2 Comp 6MT Join Date: Jan 2009 Location: UK iTrader: (2)	Air filters are before the MAF sensors so any issue with filters, broken, missing or otherwise can't have anything to do with a MAF issue? Filters are one big air leak as they're open to atmosphere on one side. ..
	Appreciate 1 Enabled1410.00 Quote

02-10-2023, 08:38 AM	#10
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	The saga continues, car still wasn’t running correctly, been picked up by recovery as refusing to drive it, they’ve had it a week and can see that something is wrong but can’t find out what so they’ve ordered loads of parts and going to replace bits and test and try. Very long winded, when I get an update I will let you all know! Original courtesy car was an X3M Comp but thing it’s going to be a 1 series this time now sigh
	Appreciate 0 Quote

02-16-2023, 05:23 AM	#11
MikewhitE92 New Member 5 Rep 26 Posts Drives: M2 Competition Join Date: Mar 2017 Location: Essex iTrader: (0)	Hi all, Finally getting the car park, the whole air system was replaced including the MAF sensors which made it slightly better but rough idle was still on start up - they run another gas test and a cold early morning and turns out there was a very small leak from one of the pipes leading to one of the turbos, piping replaced and re sealed and I’ll be picking the car up later to actually check it’s fixed!
	Appreciate 0 Quote