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    VWVortex


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    Thread: How to bypass MAF sensor

    1. Junior Member
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      1996 Passat GLX VR6 2.8L
      07-23-2012 03:35 PM #1
      With disconnected MAF-sensor the engine does not hesitating and working good.

      Is there a way just to bypass it or other words to make the "Check engine light" to turn off?
      Last edited by georgi6; 07-23-2012 at 03:42 PM.

    2. Member SilentDawn's Avatar
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      2010 GTI, 6sp, K04; 1996 Passat GLX - Turbo, 5sp; '81 Caddy
      07-23-2012 06:38 PM #2
      You either have a completely dead MAF or a vacuum leak, perhaps in the intake bellows/boot to the throttle body.

      The only way to get the CEL to turn off is to fix the real problem. Either find your vacuum leak or replace the MAF with a good used one or a new one.

      Running with the MAF disconnected is making your ECU will go into open-loop mode, where it ignores the MAF signal and calculates in an "average" baseline figure. This means you will suffer on power and fuel mileage and emissions.

      Its apparent the signal that the ECU gets from the MAF when its hooked up is much further off than what it should be. Hence, with it disconnected it runs better with the ECU's "educated guess"
      ~~Silent Dawn~~ Chris O. | DarkWülf Performance Euro auto tuning and customizing East Coast, NC/VA ///email: PM ME!\\\
      (~)'10 VW GTI; 6sp; K04(~)'99 BMW M3; Dinan S/C, 5sp(~)'96 VW Passat VR6, Turbo, 5sp(~)'89 Mazda B2200; Kia FE3 swap, Turbo, 5sp(~)'87 Mazda B2000; F2 swap, 5sp(~)'81 VW Rabbit Caddy(~)'81 VW Rabbit 5dr.

    3. Member Venkman's Avatar
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      07-24-2012 12:56 AM #3
      you could try cleaning it, but more than likely needs replaced.
      COYS!!!

    4. Member cjslapshot's Avatar
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      07-25-2012 04:32 PM #4
      It's a VR6. The car has a dead MAF. Just get a new one or pull a few from a junk yard. You will save yourself tons money and your car will get reasonable gas mileage again.

    5. Junior Member
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      1996 Passat GLX VR6 2.8L
      07-26-2012 12:09 AM #5
      I have cleaned the MAF sensor with spray from AutoZone. I used more than the half of the container – it not helps. This sensor is 1,5 years old. I both it for $85 from eBay – no name on it. The previous sensor was Bosch. I cleaned it in an alcohol left it soaked in alcohol for a whole night, without any success.
      Please, share your experience. Does the cleaning help? From where are you buying the MAF-sensor?

    6. Member Venkman's Avatar
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      07-26-2012 12:40 AM #6
      COYS!!!

    7. Member izzo's Avatar
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      07-26-2012 12:55 AM #7
      Or buy the cheaper 2.0 MAF and simply swap the 2.0 sensor in the VR6 housing.
      Plenty of threads have covered it, probbaly the best on is by VgRt6 methinks.

    8. Junior Member
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      07-26-2012 12:33 PM #8
      Izzo , do you think this one can be compatible?
      http://www.ebay.com/itm/93-00-AUDI-A...sories&vxp=mtr

      I was wondering what cause the MAF-sensor to fail? Many people state it is because of dirt or oil deposits on the sensor. I can not agree with them, or maybe it is not valid for VW because I can't see how this oil can come from the ambient air. I have had 2 sensors which failed , I didn't noticed any dirt or deposits, and the cleaning procedures doesn't help. Do you think that the cause could be not the sensor itself, but its housing? If it is made from a cheap plastic and compared to the expensive brands with reinforced housing ?
      Last edited by georgi6; 07-26-2012 at 12:37 PM.

    9. Member izzo's Avatar
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      07-26-2012 01:26 PM #9
      Heat, age, etc.

      Says aftermarket in the description. I personally would stay away.
      Like several other parts, I'd buy OEM only when it comes to MAF.

    10. Junior Member
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      1996 Passat GLX VR6 2.8L
      07-26-2012 04:44 PM #10
      I didn't find something cheaper for 2.0 in comparison to 2.8L on eBay
      http://motors.shop.ebay.com/i.html?M...=p4506.c0.m282

    11. Member izzo's Avatar
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      '96 Fiat Puntamera diesel
      07-26-2012 05:19 PM #11
      Don't buy it from eBay. germanautoparts, worldimpex, ECS, etc. for OEM parts.

      And read this thread, at least the first post: http://forums.vwvortex.com/showthrea...-are-identical

    12. Member -RalleyTuned-'s Avatar
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      07-26-2012 11:34 PM #12
      As others have stated, do not attempt to bypass the MAF, it is the most essential piece of metering equipment needed to run the engine efficiently. The issue you had was you bought an Ebay one instead of a good OEM quality one. Replace with a good used oem or new and enjoy

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