They do, at least my older 1988 and 1989 models have.
P.S. I posted a longer message about this some time ago. Here is a
copy (just keep in mind that it applies to the older models I have):
I would say it's telling you to get the oil pressure checked!
When my oil warning came on (only at high revs > ~2800 rpm), I was
told by the local mechanic that it was very likely an electronic
fault. ("If you can see the oil on top and it doesn't heat up, ...").
He wasn't able to check the pressure himself.
Eventually I drove to the audi dealer about 20km from us. It was the
oil pressure, but it was too late :-(
Luckily, I found a very good condition engine on a scrap yard, but it
seems when they put it in all pipes around the engine desintegrated
plus an engine mount. In the end I spend almost as much on this as I
did to buy that car in the first place ...
I would say better get the pressure checked right now!
P.S. I did learn a lot in the mean time:
For some reason, they have two sensors on the engine:
- One gives a fault if the pressere is below 0.3bar
- The other gives a fault if the pressure is below 1.8 bar, but the
autocheck system only complains if the engine refs with >2800 rpm.
This made me believe that I only had a problem when I went fast.
However, the other sensor was probably broken. This is indicated by an
oil warning before the engine is started. However, I was used to cars
where the oil lamp always comes on before the engine is started, so I
didn't worry about that. I know better now.
Therefore: To all with autocheck systems, if the oil warning comes on
before the engine is started, and then goes off again, it might be a
faulty oil sensor.
Important: Emails sent to me which contain my full name
in the "to:" or "cc:" field will bypass my spam filter.
The warning starts (and usually stops soon after) from as soon as a minute
or two after the engine has been started or as late as more than an hour or
so. This can occur several times over a short journey. It has been happening
for a year or so now. Warning doesn't show before the car is started
Didn't know about the two sensors - I'll check that out.
My model has an oil pressure gauge as well as an oil temp gauge. The
pressure showas as around 4 bar at all times - towards the top end of the
gauge. Oil temp is OK and oil level is always OK
I guess I've been treating it as an electrical/computer fault so far but
On the dynamic oil pressure warning system there is a small electronic
gizmo that selects between the output from the two oil pressure sensors
depending on the engine RPM. It was not uncommon for this gizmo to fail,
causing the oil pressure warning light / buzzer to come on even though
the oil pressure was fine. This electronic gizmo was built into the
tachometer on late 80's VW Golfs / Jettas, don't know if the '92 100 was
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