Help! I have an 1988 Audi 80 quattro. When slowing down, the oil pressure warning light on the dash comes on and there is a beeping. When I stop, the light goes off and the beepings stops. Our service technician has checked and says it is not the sensor or oil pump. Claims it is the engine. This doesn't make sense to me absent any sign of an oil leak. Does anyone have any thoughts?
Sam
There are two oil pressure sensors. The other one is broken.
Thanks for the reply. The service people claim they checked both sensors. Any other thoughts? Sam
If it looks like a lack of oil pressure why couldn't it be so? Change the filter and check again.
Ronald
Might just be a sensor but if not I'd say you might be looking at either a failing oil pump or possibly a sludged engine causing a blocked oil pump pickup. Dropping the oil pan will tell you. That said, I don;t know how easy that is on an 80 - it might or might not be simple. On an A4 its a bear of a job.
Have you been doing regular oil & filter changes? How many miles has this thing done & how clean is the oil in it?
Might be that it needs a treatment of this :
Bottom line is that low oil pressure (assuming this is not a sensor fault) suggests a lack of oil circulating the engine which will lead to failure fairly rapidly. If you want to keep the thing you need to get it fixed.
I.
Your tech is aware that the two sensors work oppositely, i.e. one is normally open, and the other is normally closed?
If the sensors are OK, you only have three options left:
First test:
- Disconnect the wire from the high pressure sensor.
- Connect the wire to ground and take a test drive.
If the beeping still happens, your problem is with the controller or its wiring. If the beeping goes away, you most likely have an oil pressure problem which could cause serious engine damage.
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.