Lambda Sensor Test?

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Dav-G - 04 Mar 2007 02:13 GMT

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.

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Mike F - 07 Mar 2007 13:29 GMT

> Hi Volvo People.
>
[quoted text clipped - 6 lines]
> Thanks,
> Dave.

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.

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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.)

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