Lambda Sensor Test?

  • Thread starter Thread starter Dav-G
  • Start date Start date
D

Dav-G

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 said:
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.
Click to expand...

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.)
 
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