If i go over 2500 rpm in ANY gear this problem will occur. this has been happening since i bought the car 2 and a half years ago plus 1 year by the previous owner. i thought about the oil pump but my local mechanic says its working fine. this happens no matter what the oil level is. i phoned volkswagen up and they have never heard of this problem! my mechanic has a computer for volkswagen but has no answer for this. he says there are 2 switches next to each other on the back of the block to the left as youre looking at the engine. this problem has got worse in the last year. my mate says when he replaced a switch it never done it as much but still done it. when you pull the spades off the switches the buzzer will still come on. please help!
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
Well in that case if you have the right oil, changed both sensors and the light still comes on then I'd say your engine is worn enough that the oil pressure is lower then OEM spec. How many kms on this engine ? The only other thing you can try is swap out the ECM which is located under the wipers above the firewall on the drivers side (north American). I highly doubt that its the ECM thats the problem tho, the only other thing I can think of is the wire coming from the sensors maybe pinched somewhere grounding out/shorting, since these are ground activated sensors it is possible.
Yes I think your right that engine doesn't have enough miles on it to be that low in oil pressure it has to be a short somewhere in your wiring harness or ECM.
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changed both oil pressure switches but no joy. but how can the buzzer be activated when i took off the connections. i think it could be ecm/ecu problem. the buzzer must be getting a signal from somewhere. i could just try and disconnect buzzer. its hard to get into back of instrument dials.
i just took the buzzer off the circuit board at the back of the dials. all the other dials work fine and the oil light still flashes. the engine has done 113,000 miles and has plenty of power and the oil pump is doing its job. think it is down to a broken wire from the sensors or ecm.
thanks for your help vwcaper
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