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Understanding fault code 850 1996

posted by  someone claiming to be bl on  Thu Oct 27 10:40 CST 2005 [RELATED]



I went thru the same "System too rich Bank 1" ordeal on our 96 850. Turned out to be a vacuum leak plus a failing 02 sensor #1. The 02 sensors set a code of their own eventually but fail slowly over time so it may not be right away. Check out volvospeed.com/bay 13 for common vacuum leak locations. The ECT sensor is another common failure as the ECU "thinks" the engine is stone cold all the time and sets a rich mixture

bl






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New Understanding fault code [850][1996]
posted by  someone claiming to be DogHauler  on Mon Oct 24 07:00 CST 2005 >


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