[MBZ] (no subject)

[Jim Cathey]

> possible causes? Can an oxy sensor cause an emissions failure? Is it

Absolutely.  The system is designed to run rich as a fail-safe.
(It just stinks, as opposed to destroying itself if it runs lean.)

> necessarily the cat? What are the other possible problems?

Not necessarily the cat at all, but if it's been running rich
for a long time it could take out the cat too.

-- Jim