Lambda Sensor Test?

Discussion in 'General Motoring' started by Dav-G, Mar 4, 2007.

  1. Dav-G

    Dav-G Guest

    Hi Volvo People.

    Does anyone have a reliable test for determining if the 2 Lambda sensors in
    my exhaust are functioning properly?

    My V40 1.8i has been pretty bad on fuel recently, and I was wondering if
    this was due to the Lambda sensors.

    Thanks,
    Dave.
     
    Dav-G, Mar 4, 2007
    #1
  2. Dav-G

    Mike F Guest

    After thoroughly warming up the car (by driving, not at idle), leave the
    engine running and put a high impedance voltmeter between the oxygen
    sensor signal wire and ground. The voltage should vary 3-4 tenths of a
    volt up and down centered around .45V several times per second. Or, put
    another way the voltage should vary from about .1 up to .8.

    --
    Mike F.
    Thornhill (near Toronto), Ont.

    Replace tt with t (twice!) and remove parentheses to email me directly.
    (But I check the newsgroup more often than this email address.)
     
    Mike F, Mar 7, 2007
    #2
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