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How do I properly diagnose and repair failed O2 Sensors? 850 1996

posted by  KlausC on  Fri Jan 11 16:03 CST 2008
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last visit: Fri Oct 24 10:15 CST 2014
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A search for O2 sensor will give you a lot of material. A scanner for around $150 will give you the DTC definition, but those are for V8 engines so you will have to interpret a little.

For the replacement procedures:
http://volvospeed.com/vs_forum/index.php?showtopic=65824

Great write up. I do not agree with the mechanic who said to replace both at once. The forward O2 sensor will usually go first due to the high heat. AND most O2 sensor errors are caused by vacuum leaks which cause the engine to run rich, triggering the error.

Klaus
--
The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)






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New How do I properly diagnose and repair failed O2 Sensors? [850][1996]
posted by  someone claiming to be Hugh  on Fri Jan 11 11:09 CST 2008 >


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