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  1. #1
    Established Member Two Rings Rubba's Avatar
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    A6 C7, Passat B7
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    Help! Oil light on!

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    Days ago the low oil light came on and it wouldn't go, checked oil level and it's ok so i didn't give it attention.
    Now the red oil light came on and i don't know if it's related to the oil level sensor or oil pressure? and when the light is on sometimes it goes off and return back.
    Please see below
    https://my.pcloud.com/publink/show?c...PkzgV6dbrshJcy

  2. #2
    Established Member Two Rings Rubba's Avatar
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    After disconnecting the battery the sensors are gone but after the car is warmed up for a while the red light goes on and off

  3. #3
    Veteran Member Four Rings imnuts's Avatar
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    I'd start with checking the pressure with a mechanical gauge and see if pressure is good or low. If low, look for sludge issues, if good, check the sensor & wiring.

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  4. #4
    Established Member Two Rings Rubba's Avatar
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    A6 C7, Passat B7
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    Went to a shop and told me it was oil pump but they dind't test pressure, a friend told me it's not an oil pressure related because when the red oil light goes on it doesn't say "Oil Pressure" and it's bad oil sensor since it only shows oil can.

    can anyone confirm this?

  5. #5
    Veteran Member Four Rings GOODBYNAAIR's Avatar
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    Nov 17 2011
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    1973 MG Midget, 2001.5 1.8T black.
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    On the B5 red is oil pressure and yellow is a warning. I had the red come up and it was low pressure I checked it. My CCT had chipped up and clogged My pick up tube. This was do to the PO not taking care of the car. I would get it checked out.
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  6. #6
    Veteran Member Four Rings customa4's Avatar
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    Apr 07 2011
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    02 A4 1.8T CVT, 02 A4 1.8TQ 5spd, 92 Geo Prizm
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    The red oil light means low oil pressure but that doesn't necessarily mean you need an oil pump. The pickup tube can be clogged causing low oil pressure. You're playing with fire if you continue to drive the car. Test the oil pressure. If it is indeed low, like the car is reporting, you will have to drop the oil pan at a minimum to inspect the pickup tube for clogging.
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  7. #7
    Veteran Member Three Rings a4lownslow's Avatar
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    Feb 12 2014
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    2007 Audi A4 2.0T
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    Probably clogged pickup. You do not want to continue drive. Iíd drop the pan


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  8. #8
    Established Member Two Rings Rubba's Avatar
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    A6 C7, Passat B7
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    Libya

    Big thanks everyone! i will report back soon

  9. #9
    Active Member Two Rings Arachnid's Avatar
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    Oct 18 2017
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    Play it safe and replace the pressure sensor too. Ended up going on this wild scavenger hunt when I had this happen to me. I didn't have a thing to test oil pressure but we ended up changing pickup tube, pump, and rod bearings. Turns out it was just the sensor. 😩

  10. #10
    Senior Member Four Rings
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    Jun 26 2015
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    First of all, read this thread: http://www.audizine.com/forum/showth...leshooting-DIY

    The red oil can in the middle display means the ECM is receiving the wrong signal from the oil pressure SWITCH. It is a switch, meaning it's either off or on. If you read through the above thread, you will see the conditions where the ECM expects it to be on, and other conditions where it should be off.

    Start by checking oil pressure with a mechanical gauge. Is this a 1.8T? Your profile doesn't indicate a B6, so some specifics on the vehicle would be helpful to tell you how to go about diagnosing and fixing. Don't just wing parts at it unless you want to spend more money than necessary.

  11. #11
    Veteran Member Four Rings walky_talky20's Avatar
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    You have 2 warnings there: RED IS OIL PRESSURE. Orange is low oil level. Are you certain the dipstick tube isn't broken and giving a false "full" reading? This happens.

    As stated above several times, check oil pressure with a mechanical gauge. It takes 15 or 20 minutes to do and is the only correct reaction to a red oil pressure warning (other than panic, which, is also appropriate).

    I highly recommend the very next time you even touch the key, you have a pressure gauge connected. Continuing to drive for any reason with an active oil pressure warning has killed many, many a 1.8T.
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  12. #12
    Established Member Two Rings Rubba's Avatar
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    My Garage
    A6 C7, Passat B7
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    The B6 that i have is 2.0 N/A
    I drained the oil and there was no sludge and there is no pickup tube in this motor, there is only passages.
    Changed the oil valve today, it was pretty much f*cked


    Checked wiring and it's alright, But the light still goes on....
    I revved the car at 5k and there was a lot of smoke.
    It's the oil pump or the lower part of the engine is gone. I think it's the goodbye.

  13. #13
    Established Member Two Rings
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    Jun 09 2016
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    u.k

    Of course there is a pick up pipe. Whatever is lodged in it wonít come out with an oil change or flush, it will have to be removed and cleaned or replaced. Also check the bypass valve on the oil filter housing while youíre at it.


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  14. #14
    Established Member Two Rings Rubba's Avatar
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    A6 C7, Passat B7
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    Quote Originally Posted by caluma4x4 View Post
    Of course there is a pick up pipe. Whatever is lodged in it wonít come out with an oil change or flush, it will have to be removed and cleaned or replaced. Also check the bypass valve on the oil filter housing while youíre at it.


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    I will double check that.
    Have a look at the smoke
    https://www.dropbox.com/s/r1l12oc8zq...Smoke.mp4?dl=0
    Last edited by Rubba; 02-17-2018 at 04:35 AM.

  15. #15
    Established Member Two Rings
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    After seeing that I think itís the pcv system. Positive crankcase ventilation, when that clogs up the engine struggles to breath, it will either leak oil or burn it.


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  16. #16
    Senior Member Three Rings
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    1999%20Mustang%20Cobra%3B%202003%20G35
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    my car eats oil too.
    It is the valve cover gasket on the passenger side.
    I get the same Min oil symbol you have when I let too much burn off without adding some oil.
    I never get any oil on the ground or in the bay.

    I am not sure why some folks are jumping on the clogged pick up tube.

    Also those oil level sensors do fail and are easy to change out.
    It is actually a temperature sensor.

    I would look for burned oil sludge from under the car....maybe near the bottom side of the valve cover gasket.
    then fix the problem ...
    Then change the oil and Run KREEN.

  17. #17
    Senior Member Four Rings eljay's Avatar
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    Aug 13 2015
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    2005 Audi A4 1.8T Quattro Avant / 6-speed / Ultrasport - Unicorn rescue operation in progress.
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  18. #18
    Established Member Two Rings Rubba's Avatar
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    A6 C7, Passat B7
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    Changed valve cover gasket month ago. i don't think it's the problem.
    There is no bypass valve on this motor, only on i4T and there is no pcv valve on this motor, it's only available on i4T & V6 & V8

  19. #19
    Veteran Member Four Rings walky_talky20's Avatar
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    Yes there is an oil pressure bypass (relief) valve. We aren't talking about a turbo bypass valve. See here: http://forums.vwvortex.com/showthrea...-99-9-sure-but

    Yes, there is also a PCV valve. All engines have them.
    ^Don't listen to this guy, he's not even a mechanic.
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  20. #20
    Established Member Two Rings Rubba's Avatar
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    A6 C7, Passat B7
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    Quote Originally Posted by walky_talky20 View Post
    Yes there is an oil pressure bypass (relief) valve. We aren't talking about a turbo bypass valve. See here: http://forums.vwvortex.com/showthrea...-99-9-sure-but

    Yes, there is also a PCV valve. All engines have them.
    Ok so i will look for the oil prv
    But i found something interesting... Pulled the engine cover to see this

    Could this be a sign of something? like high pressure? i found some oil in there too
    The tube goes to the engine air intake system and crankcase breather pipe
    Last edited by Rubba; 02-18-2018 at 04:54 AM.

  21. #21
    Established Member Two Rings Rubba's Avatar
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    Feb 12 2016
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    My Garage
    A6 C7, Passat B7
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    And after searching there is no pcv valve there is only breather valve which turned out to be this



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