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Thread: Lambda sensor

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  1. Lambda sensor 
    #1
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    Hi guys,

    Just want to know how easy is it to change a lambda sensor.
    Skinnyseand
     
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  2. Re: Lambda sensor 
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    you can do it yourself but they can be a bit hard to get at. i have only took one out of a passat in the scrap yard. the actual sensor was easy to get at- although the air filter, i think was removed from the car. the hardest bit was getting the wiring disconnected and fed through the clips. i am sure someone will be along soon to give better advice
    Volkswagen Passat Sport 2.0 115bhp
     
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  3. Re: Lambda sensor 
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    Thanks Chrisop. I am now trying to find where the wires lead to so I can unplug it.
    Skinnyseand
     
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  4. Re: Lambda sensor 
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    The lambda wires should lead to a four pin black plug which you disconnect. You should be able to read lambda values through vag-com but I'm not sure if all versions can. Ross-tech site may tell you which measuring blocks. If you send me an e-mail address I may be able to send some info. Goodluck
     
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  5. Re: Lambda sensor 
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    I read the values. They usually start off at around 21.2% then it rapidly goes to 0.0% then it starts juddering and losing power.
    Skinnyseand
     
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  6. Re: Lambda sensor 
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    Sounds like you need a new lambda sensor. If you can scope it you will see the voltage oscilating up and down like a switch going on and off. It must clear a high point and a low point on each cycle and manage a fixed number of cycles per minute.
     
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