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Audi A3 3.2 V6 DSG Emission Control System Fault Light

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Tuckey92, Jul 13, 2013.

  1. Tuckey92
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    Tuckey92 New Member

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    [Jul 13, 2013]
    Hi,

    just got back from driving my car and on the way home the emission control system fault light came on, any ideas as to what this could be ?

    i've be told it could be a 90% certain its an lambda sensor if so could somebody point me in the right direction and which one i will require ( part number for example or link ) as at the moment there are a few options , such as black or brown

    thanks

    Nath
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  3. Chillout
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    Chillout Active Member

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    [Jul 13, 2013]
    You should scan it to find out if it is before or after the cat on bank one or two the sensor after the cat is for monitoring purposes only
    you might find you have codes for both sensors as far as I am aware the ecu only knows the resistance is abnormal it doesn't know what sensor has the blown heater as it only measures the combined resistance.
    Last edited: Jul 13, 2013
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  4. bmh.01
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    bmh.01 Member

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    [Jul 13, 2013]
    Get the fault codes read don't guess. Could be something silly or something more serious like stretched timing chains.
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  5. Tuckey92
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    Tuckey92 New Member

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    [Jul 14, 2013]

    What do I require to read the fault code ? Please Include a link

    thanks
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  6. shariain
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    shariain Well-Known Member

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    [Jul 14, 2013]
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  7. screechmr2
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    screechmr2 Member

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    [Jul 17, 2013]
    Depending on scanning costs you can buy a scanner to check things yourself. I've got the maxscan vag450, cost just over £30 from amazon. It's a great bit of kit for the money.
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  8. Tuckey92
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    Tuckey92 New Member

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    [Jul 17, 2013]
    I just purchased vcds / vagcom got this on my laptop is this ideal ?

    Thanks
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    37 Member

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    [Jul 17, 2013]
    I've got a 1.6 Petrol and I've got error on Bank 1 Lambda Sensor. However, I have never seen the Emissions Light in my car. It's either something else or the Emission Light comes on when it's serious.

    The error on my car is:

    16555 - Fuel Trim; Bank 1
    P0171 - 006 - System Too Lean - Intermittent
    Freeze Frame:
    Lambda: 25.0 %
    Lambda Factor: 1.008
    Voltage: 0.440 V
    Speed: 0.0 km/h
    Lambda: 25.0 %
    Lambda Factor: 1.000
    Voltage: 0.440 V
    Speed: 0.0 km/h

    On a different note though - How much of a difference does Lambda sensor make to fuel efficiency? Is it worth spending £250 on it :S
    #8

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