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16804 bank 1 lambda. replaced and still the same fault code

Discussion in 'A3/S3 Forum (8L Chassis)' started by 4rings, Jan 16, 2012.

  1. 4rings
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    4rings Member

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    [Jan 16, 2012]
    had boost issues with this car for 8 months now and i am beggining to loose patience with it. its just isnt running correctly. its like there is to much boost for the revs.

    anyway i had a fault code of 16804 come up (bank 1 oxygen sensor below threshold) so i have replaced the "pre" cat lambda. i have had the second lambda reprogrammed at amd a few weeks back as it has a decat. and 3 days later after having replaced the "pre" cat lambda with a bosch one, the same fault code appears agian.

    what else could it be???
    #1
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