O2 sensor

Brett Dikeman brett.dikeman at gmail.com
Sat Nov 28 09:09:33 PST 2009

On Sat, Nov 28, 2009 at 8:33 AM, Hayes Myers <hayesmyers at gmail.com> wrote:

> Good point on o2 replacement.  Car history: I bought ~1year/25000km ago
> ...afer it apparently sat ~4 years. (car has ~270km now).  My ISV was
> cycling like crazy before I disconnected it ~5 months ago or more.  I did
> some checking then and several folks (audiworld) had changed theirs and
> solved the cycling isv  (well..engine was cycling up and down rapidly at
> idle...).

I'm 90% sure the above has nothing to do with the O2 sensor on a CIS car.

Among other things, if it does the idle ping-pong immediately (ie,
before the O2 sensor has warmed up), it's *definitely* not the O2

If it has 60k+ since the last O2 sensor change, yes, it'll help with
mileage and emissions, but it won't solve the idle problems.

I assume you've checked operation of the ISV?  Have you run all the
CIS output diagnostics?


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