Oil Light flashing and buzzing

Hi

The red oil light starts to flash and buzz when i go over 2000rpm.

There is oil in the engine.

But when i turn the indicator stalk it stops for a couple of seconds, then starts to flash and buzz again.

Really not sure what is going on.

Thanks
Alastair

Quick, simple diagnosis of Dynamic Oil Pressure Warning System by symptom.

Assuming your engine has oil and hasn't yet started knocking, most likely causes of oil lights/buzzers are in the warning system itself.

1) 2 seconds after 2000 RPM or more, light and buzzer come on, replace the high pressure switch.

2) Oil warning light on at idle, especially when hot, replace the low pressure switch.

3) No oil light blinking with key on, engine off, replace low pressure switch and/or repair light in instrument cluster.

4) If these quick tips fail to address oil warning light/buzzer issues, do not pass go, head immediately to your nearby mechanical oil pressure gauge store and buy a gauge. Buy or make a 10 x 1.0 mm threaded adapter. Test your oil pressure, cold and hot.

The Dynamic Oil Pressure Warning System adds a considerable enhancement to the oil light warning system.  There's now a high pressure switch that is normally opened, it closes at 1.8 bar.  If the engine rpm is over approximately 2000 rpm while the switch is still open, the electronic control unit flashes the warning light and sounds the warning beeper.  This is a far better system than the earlier system as it can warn you in advance of impending engine problems.

Dynamic Oil Pressure Warning System problems are most often just that, Dynamic Oil Pressure Warning System problems.

The diaphragms and the springs inside the switches get old and lose tension, the switch contacts can corrode from age and use.

It is very simple to test the control circuitry.  With the key on and engine off the oil pressure light should be on steady on early cars, or blinking on later cars. Disconnect the yellow wire from the terminal marked "WK" ("Wahrning Kontraption" in German ) on the dual sender on the left side of the cylinder head, (this is the low pressure switch), the oil light should go out.  Start the car with this wire disconnected, light should remain out.  Ground this wire and light should come on and remain on as long as this wire is grounded.
Disconnect the blue/black wire from the white, high pressure switch on the oil filter flange and rev the engine over 2000 rpm.  After approximately a two second delay the light and warning beeper should come on and remain on no matter what rpm the engine is running until the blue/black wire is grounded.

There are 4 oil sensors on these cars if you have both the Dynamic Oil Pressure Warning System and console gauges.

i have disconnected and grounded the two wires, and it is the same.

is there anyway i can disconnect the buzzer?

Thanks to Prowler for these pictures  

I have removed my oil light and buzzer [using separate guages]     :mrgreen:

Good luck with it . BUT before you remove it you must make sure the oil pressure is right , so fit a guage .

Cheers ……..