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Discussion Starter #1
Just wondered if you could take the time to give me some advise. Have read Penbryn thread..

T4 1.9 td abl

Had head gasket replaced, by apparently reputable garage.
Collected van within a day developed an oil leak.
Returned to garage twice, they said it was the rocker.
Still leaking...
Then
Getting flashing oil light and buzzer, once engine up to temp.

so one day i changed, both sensors, oil and filter change with a flush.
oil cooler gasket, brake solenoid gasket and breather o ring stopped leak.
We very happy with myself.

up to temp flashing oil light and buzzer [email protected]*k me..
Did electrical test, no fault on sensor or wiring(i am by no means auto electrician)

so sent back to garage again oil pressure test came back fine. (apparently)

they are now refusing to do any more work on the van oil pressure light flashes with buzzer when up to temp, but with now go out when i give it the beans.

I am now thinking it must be electrical, poss alternator?

any help you could give would be greatly appreciated

many thanks ash
 

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I'm in the same place m8, 1.9td. After 10 min's of motorway driving my oil light flashes and beeps. It never goes off just cruising around 30 or 40 roads.
It looks like it's my alternator as my wiring, oil pressure test (came back fine), 2 new sensors, oil and filter change have not solved it...the sump had even been off to make sure the pick up pipe isn't getting blocked. Hopefully will get it done next week.
 

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I'm having the same problem,1.9ABL 1999
Up to yet checked the oil pressure all ok. New pressure
switch fitted mine has the single switch system.
New oil pump fitted as the sump gasket was leaking,
Oil pressure checked still ok and in vw spec. New wiring to
Alternater and pressure switch still geting the buzzer.
New alternater fitted and still no good. Today I have
Wired the pressure switch and alternater straight to the fuse
Box, changed the dash clocks and it's still setting the
Buzzer off!!!!!! I don't know where to go next. Maybe a
Gallon of petrol and a box of matches?
 

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On the last post read, new oil pump.
Have a 1.9 abl td myself, earlier this year
the auxillary belt snapped on the motorway
and on came the charging lamp, and
oil pressure lamp.

Stopped of course and was recovered,
when reading into it these engines have an
oil pump that is vacuum driven!
So no vacuum, no circulation.

Not saying the belt is snapped in your case
but failure of the vacuum device could lead to
the symptoms.
 

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Just wondered if you could take the time to give me some advise. Have read Penbryn thread..

T4 1.9 td abl

Had head gasket replaced, by apparently reputable garage.
Collected van within a day developed an oil leak.
Returned to garage twice, they said it was the rocker.
Still leaking...
Then
Getting flashing oil light and buzzer, once engine up to temp.

so one day i changed, both sensors, oil and filter change with a flush.
oil cooler gasket, brake solenoid gasket and breather o ring stopped leak.
We very happy with myself.

up to temp flashing oil light and buzzer [email protected]*k me..
Did electrical test, no fault on sensor or wiring(i am by no means auto electrician)

so sent back to garage again oil pressure test came back fine. (apparently)

they are now refusing to do any more work on the van oil pressure light flashes with buzzer when up to temp, but with now go out when i give it the beans.

I am now thinking it must be electrical, poss alternator?

any help you could give would be greatly appreciated

many thanks ash
theres 2 wires from the alternator, check that they are intact as the signal wire from it makes the buzzer go off if its not in good condition.
 

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Discussion Starter #7
Seems that there are many people in the same boat here..
Am actually considering, wiring in a stand alone oil pressure gauge.
Need to sort out the hows, but i think if i ground out the high pressure sensor on the oil cooler that should deactivate the DOP system
Use the point at head sensor to connect pressure gauge.

Just need to source gauge and correct head union fittings.

I can then monitor pressure manually. This would pf course be a temp fix whilst i actually figure out what it actually is.

Any more ideas would be greatly appreciated for us all..


Just keep on truck in...
 

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The oil pump is not vacuum driven! It is driven directly from a helix gear on an auxiliary shaft. If the alternator belt snaps or is slack it won't drive the auxiliary shaft thus putting on the oil pressure light.

There are 2 oil pressure monitoring systems that activate at different pressures and engine revs. This is controlled by a basic ecu that everybody says the 1.9td abl doesn't have! (It is very basic and can not take priority) And takes engine speed measurement from the alternator.

It is usually the wiring at the alternator that is a problem.

Incidentally if the engine has run for a short period after the pump stops supplying oil pressure for example after the belt snapping your big ends could be screwed also causing a loss of oil pressure.
 

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The aux shaft is driven of the cam belt, form 1999 with blue clocks I'm 99% thay only have 1 pressure switch as mine douse
 

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Yup im still in the same boat too with my abl 1.9td

Drives from cold fantastic. Gets up to temp and then the buzzer sounds and the light flashes. If i drive at lower speeds and below 2k revs it beeps at me ! ( once its up to temp that is ). Give it some welly and its fine.

Had a recent oil change and replaced 1.9 bar sensor ( i only have one sensor too )

Wiring from the alt seems to be fine.

Might try to wire in a pressure gauge to monitor it myself. Would it be worth putting a different grade of oil in ? As the oil heats it would thin so the viscosity changes and so the pressure drops ? Thought maybe 20/50 ?

Any thoughts ?

Cheers
 

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My gut feeling is that the regulator pack on the alternator is on its way out. Try changing this to eliminate it from the equation, won't cost a lot and is easy to swap.
 

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Went from 10/40 to 15/40 made a silight increase in oil pressure on capillary guage but still buzzer when up to temp. The only way foreword I can see for me is to put an genuine sender in see if that helps. It's had a new sender but was a non genuine one. Got a 0 to 10 bar guage to fit just need a 0 to 10 bar sender work so can keep a eye on the pressure at all times. It's driving me nuts!
 

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The aux shaft is driven of the cam belt, form 1999 with blue clocks I'm 99% thay only have 1 pressure switch as mine douse
Hmm mine is a 1999 with 1 pressure switch but i haven't got blue clocks !

Crikey it gets more confusing everyday !! LOL:
 

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My van is a T plate, date of first registration 21,05,1999. Has the blue clocks and 1 sender. The sender fitted to mine is a brown top with the round plug not shore if it the corect sender
 

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interesting

I have just posted about Oil Light after changing Filter Pressure sender.
Original Proper VW one 0.75-1.05Bar was replaced apparently with one that has
a specific rating of 0.9Bar.

One site said mine was a Grey sensor another says White.

Mine has two sensor with a Blue one in the Head.

Mike
 

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my pressure sensor is a white top and sits on the oil filter part

i will check the alt wiring again to double check !

starting to do my head in lol :*
 

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If it's only happening when up to temp then i'm guessing it might be actual low oil pressure.

The oil gets thinner and can pass through the bearings a such a lot easier.

Just get a cheapo gauge on eBay. Simple to fit.
 

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If it's only happening when up to temp then i'm guessing it might be actual low oil pressure.

The oil gets thinner and can pass through the bearings a such a lot easier.

Just get a cheapo gauge on eBay. Simple to fit.
indeed but what is the fix to this problem ? what is the actual problem ? maybe i will get my head round it one day :D
 
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