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Thread: Emmisions light

  1. #1
    Regular Member dan1983's Avatar
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    Default Emmisions light

    Hi can anyone help. I put a k&n filter on my 2.0t (sounds great) but my emmissions light is constantly on, it actually came on when i did my air box mod originally. My mate reckons its the lamda sensor. any ideas?

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    Regular Member Gsi3.2's Avatar
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    check the Mass airflow sensor connection as a first off..

    it has to be something you disturbed when you fitted the K+N and did the mod..don't just swap out the lambda but retrace your steps first, then get the codes read if it still won't go out..I lay good money on the lambda sensor being fine...

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    Regular Member dan1983's Avatar
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    What codes? I did go off for bout a week or so.

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    Regular Member Gsi3.2's Avatar
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    when the emissions light comes on, the ECU's store a fault code to tell the techie what actually is wrong with the car..so a trip to VX to get the codes read ( or any garage with an OBD-II compliant scantool with live values) will be no end of help in sussing out whats going on..but if it's coincidental with you installing the K+N then i'd start looking at the MAF and it's wiring first..

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    Regular Member dan1983's Avatar
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    Thanks will check first cos didnt want to fork out on vx telling me whats wrong then charging me again to do it

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    Regular Member Gsi3.2's Avatar
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    thats the beauty.. they tell you whats wrong, then you just take it away and get it done somewhere cheaper.......

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    Regular Member dan1983's Avatar
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    yeah but they charge you to tell you whats wrong

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    Regular Member Gsi3.2's Avatar
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    Default

    yep, as will anyone......But £45 is still cheaper than a lambda sensor, if thats not whats wrong with it..

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