1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Would this cause this???

Discussion in 'A3/S3 Forum (8L Chassis)' started by Welly, Mar 22, 2010.

  1. Welly

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    121
    OK - have had a problem with the ESP light being constantly on on the dash lately....

    VAGged it and found this:

    00810 - Sensor 1/2 for Brake Pressure
    27-00 - Implausible Signal


    Which relates to this: http://wiki.ross-tech.com/wiki/index.php/00810.

    Question is - would this bring the ESP light on, but NOT the ABS light. ABS light is not on, and has never been on.....
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. Welly

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    121
    Also - there are no HALDEX errors at all before anyone asks....
     
  4. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

    Joined:
    Sep 14, 2008
    Messages:
    18,235
    Likes Received:
    2,412
    There are 2 sensors in the brake master cylinder... think its related to those... They are 'thrust' sensors IIRC and are used by ESP...

    <tuffty/>
     
  5. Welly

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    121
    Yeah, I just googled this and looks like this can cause this issue. That would be good to get sorted at some point actually - that light is driving me potty!! lol
     
  6. SteveBAM

    SteveBAM Black '03 S3

    Joined:
    Sep 22, 2009
    Messages:
    180
    Likes Received:
    1
    this will be interesting to see, i have had the same problem with no errors coming up...mine usually comes on and stays on after violent accelerations and wont turn off till i turn the ignition of and back on again..!!
     
  7. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

    Joined:
    Sep 14, 2008
    Messages:
    18,235
    Likes Received:
    2,412
    Have you checked the fault codes? ESP light staying on is also related to MAF issues as well as latitudinal and longitudinal acceleration sensors...

    <tuffty/>
     
  8. Essflee

    Essflee Well-Known Member

    Joined:
    Mar 26, 2008
    Messages:
    2,088
    Likes Received:
    45
    Mine does this on hard acceleration too, I always get a fault saying 'maf signal to high'...

    I've changed the maf but still get this fault come up, usually in a high gear from low revs when the torque pulls me along.
     
  9. SteveBAM

    SteveBAM Black '03 S3

    Joined:
    Sep 22, 2009
    Messages:
    180
    Likes Received:
    1
    well it usually happens when im out and about and i don't have my vag com with me..ive been waiting for it to happen again for some time now and it hasn't..hopefully next time it does ill be close to home to check it with the vag com..
     
  10. leshkin

    leshkin Hold my beer...
    Gold Supporter VCDS Map User Team Sepang Audi S3

    Joined:
    Sep 10, 2006
    Messages:
    1,426
    Likes Received:
    414
    Do your brake lights work, when the light comes on? If they don't, I would start with replacing the brake pedal sensor first. It sits at the top of the pedal and to replace it you do need to get your hands dirty and remove the driver's side of the dash.

    This is a very common fault and can be confusing as hell, because the diagnostics system seems to think the the pressure in the brake system is being incorrectly reported (implausible signal), when it's the actual pedal position that is not being sensed properly. The brake lights are directly controlled by the pedal sensor/switch, so if it's not functioning properly, the brake lights don't work.
     
    #9 leshkin, Mar 22, 2010
    Last edited: Mar 22, 2010
  11. Welly

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    121
    Brake lights are good matey sadly, that would of been lovely!! lol
     
  12. leshkin

    leshkin Hold my beer...
    Gold Supporter VCDS Map User Team Sepang Audi S3

    Joined:
    Sep 10, 2006
    Messages:
    1,426
    Likes Received:
    414
    Bummer... still might be the brake sensor (there are two in the same box - one for pressure on the pedal and the other it's counterpart, which measures the 'pull' )

    Try logging ABS Brakes controller via VCDS and look for a block that might indicate brake pedal position and brake system pressure. I'm not sure which one this would be, but it might be group 005 based on what I saw somewhere.... I can have a look tomorrow to confirm.

    This might give you some idea if the brake pedal position sensor is reporting conflicting data (pressure is being reported correctly, but the other is not detecting anything).
     
  13. leshkin

    leshkin Hold my beer...
    Gold Supporter VCDS Map User Team Sepang Audi S3

    Joined:
    Sep 10, 2006
    Messages:
    1,426
    Likes Received:
    414
    Ah! Just trawled through the wiki article for this error, and they recommend performing basic setting on brake pressure. Looking at the procedure for this on the same site, they say to do the following:

    Brake Pressure Sensor 1 (G201)

    Prerequisites:


    • System voltage at least 12.0 V.
    [Select]
    [03 - Brake Electronics]
    [Coding-II - 11]
    Enter 40168, to enable the basic setting.
    [Do it!]
    [Basic Settings - 04]
    Group 066
    [Go!]
    Activate the Basic Setting.
    [ON/OFF/Next]
    After a successful basic setting, field 2 should say "OK".
    [Done, Go Back]
    To make sure the basic setting was succesful, check the sensor again.
    [Measuring Blocks - 08]
    Group 005
    [Go!]
    Check field 1, the value has to be between -7.0 and +7.0 bar.
    [Done, Go Back]
    [Close Controller, Go Back - 06]

    This will try to reset the sensors and assuming everything is workign as it should, the error might go away.

    Wouldn't hurt to try this either.
     
  14. OllieH

    OllieH Member

    Joined:
    Aug 27, 2009
    Messages:
    368
    Likes Received:
    0
    Welly, sorry for the thread revival, but did you ever sort this problem, and what did it turn out to be?

    I'm having a similar problem atm. My ESP light used to come on intermittently, resetting if I restarted the engine. Then recently it came on and now wont reset. VCDS brings back the following fault codes:

    00810 - Sensor 1/2 for Brake Pressure
    27-00 - Implausible Signal


    00813 - Sensor 2 for Brake Pressure (G214)
    57-10 - Electric Circuit Failure - Intermittent

    Googling it brings back various results. Some for a sensor on the master cylinder, some for a sensor in the ABS controller, some for a sensor on the brake pedal and some for broken cables in the wiring loom. Just trying to narrow it down abit so I don't end up spending alot of cash changing things that dont need to be changed.

    Any advice would be appreciated.
     
    #13 OllieH, Apr 29, 2013
    Last edited: Apr 29, 2013

Share This Page