Right I've done a search, but didn't want to post in an old thread.
Yesterday on my way to work the oil pressure light came on and flashed very slowly and lightly. About four hours later it was still doing the same.
On my way home, it didn't flash at all. I got in and checked various things on various Golf websites and it seemed to point to a few things i.e. sensors, oil pick up, oil pump etc.
I went out and checked to see if there were any leaks (none I could see) and made sure both wires on the sensors were connected. I then tried the car again and now the oil pressure light was flashing fully, but still no buzzer.
I then did another search and found this:
always worth replacing both the oil pressure sensors before you do anything else, from the symptoms it sounds like the black/brown low pressure sensor with the blue wire is at fault. Check the wiring for damage, and the oil pressure warning control board in the clocks can sometimes be faulty also.
If the oil pump was on the way out you would get the oil pressure warning light and a buzzer sound over 2k rpm, the white sensor with the yellow wire is reponsible for this. To test its working disconnect the yellow wire and rev the engine over 2k. If the buzzer comes on that means the high pressure warning switch is working and that your oil pump is probably fine.
I've now tried the highlighted part and my light does flash and buzzer does come on at over 2k.
What should be my next step - change the sensors to see if that rectifies it, or get a pressure test?
I'm just wondering as my local garage were going to charge me £30 the other week to do a compression test on a different car, I'd rather put that £30 towards a new oil pump tbh. I just thought as I'm not actually using the car because of this problem, I might be better off changing the sensors first.
