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Cat Converter 850 1995

posted by  KlausC on  Wed Oct 21 13:43 CST 2009
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

Correct, but not everyone buys Bosh.
The DTC points to the cat because the difference of what the forward O2 sensor detects and the rear O2 sensor detects. The only way to definitively answer the CAT question is to hook the car up to a monitor and watch the O2 sensors do their thing.
Because your car is running good, the CAT is not blocked, it could be just a dirty front O2 sensor. Or it could be a bad CAT, which does happen depending on the fuel supplied. Any amount of lead will kill it at this age - I know, there isn't supposed to be any leaded gasoline in the USA. But large amounts of sulphur will also coat it badly.

Klaus
--
Proud owner of a 1967 220S. If I had more room, I would have more Volvos.






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