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Re: GOLF 1.9 TD 1996
The light and buzzer are indicating low oil pressure and therefor if there is enough oil in th engine then you should have the oil pressure tested because you could have, amingst other things, a worn oil pump, a clogged strainer or a sticking oil filter check valve
Maybe you could try an oil and filter change using a good quality oil filter?
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check to make sure the oil pressure sensore is working correctly,, you might need a new sensor.
could also be a sign that you are not getting enough oil pressure and this could be caused by a bad oil pump. but check the sensor first and see if this solves the problem.
The oil pressure sender unit is located on the oil filter housing.These do tend to leak at times. The warning light for this switch is a red oil can and a buzzer. Replace the switch. If warning light still comes on, have the oil pressure checked. The oil level sender warning light is an orange oil can with oil level under it. This sender is fitted on the bottom of the oil sump and can leak past the seal. If warning light comes on, check oil level. If ok, check for damage to wiring under vehicle. Senders do some times become faulty.
Had exactly the same problem, completely baffled us until we discovered that the it was the oil pressure switch. We had already replaced it with a new one and then that didnt fix it so we fitted a new oil pump, but as soon as it was revved over 3000 revs the oil light came on. It turns out that there is actually a choice of 2 oil pressure switches for this car (1999 1.4 polo) one works only low pressure (black cap) and is the wrong one, the other works on a higher racio (green cap) its the high pressure one you need. If the oil light was on at tick over or below 3000 revs then its the lower oil pressure switch needed, above 3000 its the higher one. The parts people insisted there was only one, but there is definately a choice of 2 and it fixed ours instantly. If it was an older model they actually have 2 switches on the car itself and one is a high pressure and one is a low pressure (just incase anyone needed to know)
Well theres two possible reason for this, 1: the engine is worn enough to let the oil blow by the main bearings causing the oil pressure to be lower then OEM spec thus activating your oil light/buzzer or 2: your using the wrong type oil, you should be using 15W40 diesel grade in all 98 and older vdubs gas or diesel engines. Alos there is one more thing you could try if you have elliminated step 1 and 2, the oil pressure sensors do wear out, replace them both (high pressure and the low pressure) there are under $15 each and easy to change. Good luck
There are two pressure switches. One for oil pressure and one for a dirty oil filter. Are you sure you've changed the right switch. If car drives for 30 mls it doesn't sound like you need an engine. The spluttering is likely to be completely unrelated to the oil warning I suspect.