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Esp Driving Me Nuts

Discussion in 'A3/S3 Forum (8L Chassis)' started by danfloun, Aug 18, 2014.

  1. danfloun
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    danfloun Member

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    [Aug 18, 2014]
    Last week my ESP started kicking in once in a while without reason. Sometimes the light comes on the dash but with no braking etc, but now it's worse and the actual ESP light comes on and it brakes randomly. Sometimes it happens while driving normally without touching the brake pedal. Often it does it while depressing the rake pedal. It seems worse this week and braking can cause the front wheels to lock up and skid due to the ESP taking over... how ironic, ESP making it more dangerous to drive.

    I thought I heard my rear disc squeaking, so assuming it was this I stripped it and cleaned everything up. Pads and discs are only about 12 months old so in good condition. I have no sensors in the pads. The pads were indeed tight on the disc, which I was certain was causing the fault with esp. Not so, it's still doing it. Is it likely that sticking pads/discs are causing the esp fault?
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  3. westcoast a3
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    westcoast a3 Member

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    [Aug 18, 2014]
    Have you scanned for codes, could be brake pedal switch amongst other things, when the light for esp lights up this means it's not working, not activating if you know what I mean ??
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  4. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Aug 18, 2014]
    Have you scanned for fault codes?... I had this issue recently with my A2 and its was a faulty ABS sensor... I had an implausible signal fault code on it but I ended up fitting new bearings (integrated ABS sensor ring), new sensor and new cable... turns out the cable was fine but I would first scan for fault codes on the ABS module then check the ABS sensor rings to see if they are damaged...

    If a scan brings up a fault code for the front sensors then typical issues are damaged ABS wiring or sensor... front ABS sensor rings are easily damaged when people fit spacers as they tend to use bolts that are too long which can catch the sensor ring

    Scan first though..

    <tuffty/>
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  5. danfloun
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    danfloun Member

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    [Aug 18, 2014]
    Well with all the trouble with the temp sensor and now this, in the space of a few weeks, I'm beginning to think that this is either an earth / ground issue or a battery voltage issue. On the other hand, tufty may be right. Battery as of tonight reads 12.25v. I'll read it again in the morning.

    Address 03: ABS Brakes Labels: 1C0-907-37x-ESP-F.lbl
    Part No: 1C0 907 379 E
    Component: ESP FRONT MK60 0104
    Coding: 0011266
    Shop #: WSC 06435 000 00000
    VCID: 2C5D1A698C10169

    2 Faults Found:
    01542 - Yaw Rate Sensor (G202)
    008 - Implausible Signal - Intermittent
    01542 - Yaw Rate Sensor (G202)
    012 - Electrical Fault in Circuit - Intermittent

    I should say I still have the temp sensor fault. It's between the sensor and the cluster as the ecu side of sensor is reading normal whereas gauge on cluster jumps up to 120 at cold start now, which makes me think whatever is causing the cts fault is causing the abs fault.
    Last edited: Aug 18, 2014
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  6. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Aug 18, 2014]
    http://wiki.ross-tech.com/wiki/index.php/01542

    01542 - Yaw Rate Sensor (G202)
    01542 - Yaw Rate Sensor (G202): Electrical Fault in Circuit
    Possible Symptoms
    • Malfunction Indicator Light (MIL) ON
    Possible Causes
    • Wiring and/or Connector(s) from/to Yaw Rate Sensor (G202) faulty
    • Yaw Rate Sensor (G202) faulty
    • ESP-Sensor Unit (G419) faulty
    Possible Solutions
    • Check Wiring and/or Connector(s) from/to Yaw Rate Sensor (G202)
    • Check Yaw Rate Sensor (G202)
      • Check Measuring Value Block (MVB)
    • Check ESP-Sensor Unit (G419)

    01542 - Yaw Rate Sensor (G202): Implausible Signal
    Possible Symptoms
    • Malfunction Indicator Light (MIL) ON
    Possible Causes
    • Ground Wiring and/or Connector(s) from/to Yaw Rate Sensor (G202) faulty
    • Installation Position of Yaw Rate Sensor (G202) incorrect
    • Yaw Rate Sensor (G202) faulty
    • ESP-Sensor Unit (G419) faulty
    Possible Solutions
    • Check Wiring and/or Connector(s) from/to Yaw Rate Sensor (G202)
    • Check Installation Position of Yaw Rate Sensor (G202)
    • Check Yaw Rate Sensor (G202)
      • Check Measuring Value Block (MVB)
    • Check ESP-Sensor Unit (G419)

    01542 - Yaw Rate Sensor (G202): No or Incorrect Basic Setting / Adaptation
    Possible Causes
    • Yaw Rate Sensor (G202) Basic Setting lost/not performed
    Possible Solutions

    This being faulty would cause ESP related issues...

    <tuffty/>
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  7. danfloun
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    danfloun Member

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    [Aug 18, 2014]
    :-/ that's not good news. I'm gonna treat it like an electrical fault first then move on. I think its too coincidental to have the cts and raw and esp all going loopy at once.
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