 » Site Navigation | | | | » Recent Threads | | | | | | | |  |  |  |  04-03-2007, 06:14 PM | #1 | | Junior Member Join Date: Jul 2006 Location: North Posts: 12 |  Check Engine Light - Mass Airflow Sensor
Hey everyone. I recently got the cat and exhaust replaced on my 98 ti. Both are OEM. I was driving home from work in stop and go traffic and my check engine light came on.
When I took it to my mechanic he plugged in the scanner and the code was for
the Mass Air Flow Sensor. He told me it had to do with the gas possibly running too rich or too low. He reset the code and told me to notice anything different about my exhaust (thicker smoke or funny smell). At the time he told me that he didn't know what the problem was but that most likely my mass airflow sensor would have to be replaced but he wanted to wait and see if it happened again. He told me that I would just have to drive my car and make sure I notice the next time my check engine light goes on.
Could anyone shed some light on what this problem could be and maybe some things that I could check for?
Thanks |  |  | | 04-03-2007, 07:49 PM | #2 | | Member Join Date: Mar 2007 Location: Scotland Posts: 41 |
First, it's real easy to check if you have a faulty MAF, although this is not a definitive test; just unplug it, and see how your car runs. It it seems to run the same, then you probably have a faulty MAF. If it runs worse, your MAF MAY BE OK. If the car runs much better, your MAF is definitely history. Second, before you buy a new MAF, try cleaning the one you have, like THIS: http://www.louv.tv/cars/m5/MAF/ hope this helps. Also, if you DO need a new MAF, check the Bosch serial number carefully, and then go to www.performancecafe.com. It's a VW site, but the MAF for the Golf IV has the same Bosch sensor part as a lot of BMWs. I bought one off them (much cheaper than BMW!) for my 535. Perfect! __________________
2000 316i SE Compact 1.9 | | | | | 04-04-2007, 12:05 AM | #3 | | Member Join Date: Nov 2005 Location: Shediac, N.B. Canada Posts: 96 |
Check for cracks in the rubber boot that is connected to the MAF... mine was cracked and it caused the CEL  __________________ 
1995 Canadian Spec Schwarz II Ti Base Model.... 5spd, Untinted Windows, Bilstein Sports, Bav Auto Springs, E36 Sport Wheels, 225/50 Fuzion HRi's, MK3 Jetta VR6 Front Lip, Cosmos Racing Short ram intake, Luk Clutch kit, Apexcone projectors, DDM 6000K HID, Shortened shift knob, Pioneer stereo, Autopage Alarm | | | | | 04-04-2007, 12:34 AM | #4 | | Junior Member Join Date: Jul 2006 Location: North Posts: 12 |
Typically how much does a mass air sensor go for? Just curious. | | | | | 04-04-2007, 01:00 AM | #5 | | Member Join Date: Nov 2005 Location: Shediac, N.B. Canada Posts: 96 |
BavAuto sells them for 389.95,. This as of 2 minutes ago  You could probably find a used one at a Junk Yard for cheaper... __________________
1995 Canadian Spec Schwarz II Ti Base Model.... 5spd, Untinted Windows, Bilstein Sports, Bav Auto Springs, E36 Sport Wheels, 225/50 Fuzion HRi's, MK3 Jetta VR6 Front Lip, Cosmos Racing Short ram intake, Luk Clutch kit, Apexcone projectors, DDM 6000K HID, Shortened shift knob, Pioneer stereo, Autopage Alarm | | | | | 04-04-2007, 08:38 PM | #6 | | Member Join Date: Mar 2007 Location: Scotland Posts: 41 |
At Performance Cafe the Bosch sensor (you have to unscrew it from the VW airpipe and fit it to the BMW pipe from your car) cost me $75. It had exactly the same Bosch part number as the one I took out of my BMW 535, for which the best price here in the U.K. was £184. __________________
2000 316i SE Compact 1.9 | | | | |
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