Flashing red oil light 1.4L 2005 new beetle cabriolet

tojjm

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Hi,
My daughter called me saying there was a flashing red oil light on her dash board and she topped the oil up, then she had white smoke, I checked the oil level and it was half way up the dip stick, I have drained the oil and replaced the oil level sensor in the sump, then I checked on here and found that this fault is not oil level. I started the engine left it running for 10 minutes then took it for a drive, just after the red oil light started flashing and beeping, drove back home, starts and drives really good. Can anyone tell me what i need to check, replace please?
 

Crasher

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Yellow warning is level, red warning is ohh 5h1t... You need a proper oil pressure test carrying out using a gauge to replace the switch in the head, the thread is an M10x1 if you want to buy your own gauge. It could be a blocked pick up pipe in the sump, if it isn’t you can look at it as being terminal.
 

tojjm

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Hi, thanks for advice, where in the head is the oil pressure switch and what pressure should I be getting? Do I run the engine for a bit or just take reading? , if it’s the pick up pipe is that sump off and clean, can sump be taken off the engine without removing engine from car, thanks again.
 

Crasher

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It is on the number four end of the head, pointing straight out towards the radiator, old part number 036 919 081 A but now 036 919 081 D and £20.30 from VW. but much less for a Febi 19014, it is supposed to be green and switches between 0.3 and 0.6 Bar and normally open, pressure to close circuit.



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tojjm

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Thanks again, so I’m looking for oil pressure of under 0.3 bar, could it be the oil pressure sensor?
 

Crasher

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The specification for the oil pressure is a minimum of 2Bar at 2000rpm at 80 degrees centigrade oil temperature but in reality you need to see 3Bar as a healthy figure and at idle, around 1Bar. Yes it could be the sender, they soften fail and the version originally fitted to that engine has been revised.
 
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