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  1. #1
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    A3 Emissions control system warning light

    I have an A3 1.6 MPI 2006MY, which appears to have an intermittent fault with the upstream Oxygen sensor.
    A diagnostic scan reports the following:-
    "Linear oxygen sensor B1 S1 pump current trim circuit open P2626"
    "Sporadic 008 implausable signal"
    When I clear the fault code the Emission warning light goes off, but I noticed that the fault code returns but no warning light comes back on.
    I assume I need a new sensor, but as these are expensive-around £150, and it is a pig to access, and is very tight, are the emissions affected,as its MOT is due shortly?
    The car drives perfectly, and fuel consumption is excellent.

  2. #2
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    Re: A3 Emissions control system warning light

    If you don’t replace the sensor the cat could be damaged.
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:


    www.helpforheroes.org.uk

    Keep XH558 in the air
    www.vulcantothesky.org


  3. #3
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    Re: A3 Emissions control system warning light

    The car has just passed the MOT. It is unlkely the fault will affect the CAT, although I intend to replace the suspect sensor anyway.

 

 

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