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oxygen sensor 850 1994

posted by  keram on  Fri Aug 16 09:31 CST 2002
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hello

I have volvo 850 with engine b5252 ( 10 valve )
I read that there are 2 oxugen sensor front and rear but there is nothing
at the rear. Can anyone tell me are there volvos from that year with
one oxygen sensor, or maybe someone has taken it out.
By the way in the place where there should be 3 connectors
grey and 2 black i have only one blue. Also the o2 sensor appears to be
from year 1992 while the car is from 1994 amn it has 4 wires ???

need help
tks







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