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Error Codes and general advice

Steve Welch Jul 24, 2013

  1. Steve Welch

    Steve Welch New Member

    Ok so my A3 that i bought on a limb has 4 error codes. It is a 1.6 1998. I looked in the section for help but it was not coming up.

    So the codes are

    00537 Oxygen Sensor Control
    00557 (no code found in the manual)
    00525 02 Sensor - Voltage Low - G39
    00668 Battery Power Voltage Supply (terminal 3)

    So does this mean i must replace the Lambda Sensor (i am guessing there is only one in the front downpipe)

    It is idling a bit rough and is stalling VERY easily.

    Any help or advice or help would be greatly appreciated. Remember i am a relative noob so idiot speak would be preferred! :salute:
  2. dusty

    dusty Active Member Team Nogaro Blue Audi S3

    If you type the code into google one of the first results is for Ross techs site were you will find the info your looking for
  3. Steve Welch

    Steve Welch New Member

    I have studied all of them further and i think my two first port of calls are:

    1: New battery
    2: Pre cat lambda sensor.

    Here are a few pics of more findings.

    After running/starting this appears on the ground from the exhaust


    There is this sludge in the top of the coolant that doesn't smell of anything.


    This is one of her bad starts:

  4. jbh

    jbh TDi lover

    have a read on this. 1.6 AEH Engine - Idling Problem - Page 2
    where in fife are you?
    what miles is on your car? have you checked for vac leaks or any air leaks?
  5. Steve Welch

    Steve Welch New Member

    Hey buddy, i did check for leaks and it all seems good as i had a leak in my mazda before and it turned out to be a split in the air intake.

    I had a read of that and i think it is all coming together. Very soon i will have her on the road. I am in Cowdenbeath but i was brought up in Glenrothes.
  6. <tuffty/>

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

    00557 - Ross-Tech Wiki

    00557 - Pressure Switch; Power Steering (F88)
    00557 - Pressure Switch; Power Steering (F88): Short to Ground
    Possible Symptoms

    Engine shuts off while steering

    Possible Causes

    Fuse(s) faulty
    Wiring and/or Connector(s) from/to Power Steering Pressure Switch (F88) faulty
    Power Steering Pressure Switch (F88) faulty

    Possible Solutions

    Check Fuse(s)
    Check Wiring and/or Connector(s) from/to Power Steering Pressure Switch (F88)
    Check/Replace Power Steering Pressure Switch (F88)

    Codes resource available here..
    Category:Fault Codes - Ross-Tech Wiki

    Also worth a read


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