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Old 01-10-2009, 08:05 PM   #1
Clean_3
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MAF Sensor causing Transmission Limp Mode?

So I bought the peake tool the other day and pulled the codes(Thanks to Ken for the Great Customer Service from bimmertools!), one of them was the mass air flow sensor the other after being cleared never came back (19 - 27). My question is will a faulty maf sensor cause my transmission (!) to go into limp mode and can the maf be broken by a light hit to it (not directly but the outside plastic). I did search and couldnt get a definite answer on this.

TIA
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Old 01-10-2009, 09:40 PM   #2
Clean_3
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Savage BMW wanted $661.49 for the MAF sensor lol ... That place is such a F'n joke and their service Dept is such a ripoff ....

Guess i'll go with ebay or something else because $350 through pelican is still pricey ... so anybody know if these two have any correlation?
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Old 01-10-2009, 10:26 PM   #3
richyboycaldo
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I have a code that says thay my MAF is bad and my car does go into limp mode to.
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Old 12-29-2011, 11:18 PM   #4
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any solution to this? Same issue here.
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Old 12-30-2011, 12:29 AM   #5
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any solution to this? Same issue here.
A good place to start would be a trip to Advance Auto. I was having MAF errors a while ago and I too was worried that I possibly had to purchase a new sensor. What i needed up doing is buying a can of CRC Mass Air Flow Sensor and cleaning my sensor with it. It's around $8 or so it wouldn't be a bad place to start. Try it, it could potentially save you $$$$.

Happy Holidays,
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Old 12-30-2011, 12:32 AM   #6
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You have a 2002 325i, which means you can buy the Hyundai Sonata MAF which is the exact same OEM part for about $150.

http://forum.e46fanatics.com/showthr...hlight=hyundai
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Old 12-30-2011, 12:51 AM   #7
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or get an used MAF from classified forum
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Old 12-30-2011, 10:51 PM   #8
BMWUSMC3051
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Your MAF can cause the car to go into limp mode because it's intertwined with all on board computers in the car do if it's bad it could be the reason also Definently try MAF cleaner by CRC like it was mentioned earlier also u could check the voltage on the MAF and if that's bad buy a new one and put it in yourself haven't hear about the hyundai MAF working but if it does good cuz u won't find one or less then 350 online and instal ur self my local BMW dealer wanted 200$ for mine took me10 minutes to take out clean n put back.
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Old 12-31-2011, 12:32 AM   #9
boyguan
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I had a limp transmission before and I did replace the maf and it did return. You need to find the code and fix the actual problem. My code was for engine stall speed and I just replaces my engine pulse generator in the transmission. And I hope that will fix it.
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Old 12-31-2011, 02:27 AM   #10
screamer-beemer531
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Originally Posted by jayinsaney View Post
A good place to start would be a trip to Advance Auto. I was having MAF errors a while ago and I too was worried that I possibly had to purchase a new sensor. What i needed up doing is buying a can of CRC Mass Air Flow Sensor and cleaning my sensor with it. It's around $8 or so it wouldn't be a bad place to start. Try it, it could potentially save you $$$$.

Happy Holidays,
Jay
+ 1 I had a MAF issue once and a mechanic friend cleaned it for me. I was about to replace it. It startles me how some people replace them when all they need is cleaning. This isn't always the case however some people lose hundreds because they didn't know this.
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Old 01-05-2012, 07:25 PM   #11
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Quote:
Originally Posted by BMWUSMC3051 View Post
Your MAF can cause the car to go into limp mode because it's intertwined with all on board computers in the car do if it's bad it could be the reason also Definently try MAF cleaner by CRC like it was mentioned earlier also u could check the voltage on the MAF and if that's bad buy a new one and put it in yourself haven't hear about the hyundai MAF working but if it does good cuz u won't find one or less then 350 online and instal ur self my local BMW dealer wanted 200$ for mine took me10 minutes to take out clean n put back.
I have cleaned both maf and connector in a previous attempt. No change. Quick question... When my maf is unplugged there seems to be no change in the car at all. I have even unplugged it while running expecting it do die out. No changes at all. Anyone know if this is normal. Doesn't seem normal.

Also, I have been trying to search around how I can test this maf with a multimeter but there has been no definitive answer. I need to know what the colors mean on the 5 wire maf. Also, would should the values be if i am testing between the wires. While I am there it would also be helpful for me to check the harness as well, but I need a little help finding what to look for. Any thoughts?
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Old 04-18-2012, 02:16 PM   #12
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Any solution yet?
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Old 04-18-2012, 02:26 PM   #13
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New doesn't have to mean expensive

http://www.bmaparts.com/ShopByVehicl...=True&rewrite=
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Old 04-18-2012, 05:38 PM   #14
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Hi guys. I have read that the automatic transmission needs a correct signal from the maf to work correctly. Over here some tranny specialists have even claimed that a faulty maf can kill the tranny. So - if the codes say that maf is faulty - dont drive around like that for too long. Limp mode? No idea.

How can you check maf? Use OBD to read out air mass (according to maf) and check if the numbers make sense.
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Old 03-17-2017, 12:02 PM   #15
Tcleaver
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Just got my car scanned, called for MAF, one can find the MAF online for $25-30 used or like the previous posts the hyundai ones work the same. If you simply type in the PBT-GF30 PN online you can find multiple vehicles that use the same part and find the best price.

Just cleaned my stock MAF, hoping it works out to clean up limp mode. Will know in a few.. Otherwise ill be out $150 or so..
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