Oil pressure sensor - NLA and what to do

[S2_avant 19930325]

This thread gives an alternative solution of fitting a "T". With that in place you can fit an individual oil pressure switch with an individual oil pressure sensor.

https://www.s2forum.com/forum/technical/engine-and-turbo/59072-oil-pressure-warning-light#post927753

Not exactly but I did get round the problem by replacing the combined oil pressure sender and low pressure switch unit with a "t" piece into the block and then fitting a seperate oil pressure sender - that came with a Glowshift 270 degree oil pressure gauge and a seperate low pressure switch. Mine came from a mini but a standard VAG switch from a Polo or Golf would do.

John

So you plug the lower oil hole for the single oil sensor with one wire.
And then you use a "T" on the upper hole so the big sensor and the singel sensor is connected to ? What does it make for difference ?

[johne]

There is also a Ridex oil pressure sender unit on Autodoc for under Euro50. Part number 805O0008, worth investigating.

[johne]

This thread gives an alternative solution of fitting a "T". With that in place you can fit an individual oil pressure switch with an individual oil pressure sensor.

https://www.s2forum.com/forum/technical/engine-and-turbo/59072-oil-pressure-warning-light#post927753

[S2_avant 19930325]

This should work ??

[S2_avant 19930325]

FCP euro sell aftermarket ones. I have an FAE one and it works perfectly.

https://www.fcpeuro.com/Parts/?keywords=035%20919%20561

I can find FAE in sweden and if they work i can go with them ,,, great ...

[S2_avant 19930325]

https://www.s2forum.com/forum/welcom...0-owner/page75

i saw all the pages ,, ufff,, great info ,,, thanks a lot.

[le mans]

FCP euro sell aftermarket ones. I have an FAE one and it works perfectly.

https://www.fcpeuro.com/Parts/?keywords=035%20919%20561

[Tractor Dave]

https://www.s2forum.com/forum/welcome-area/introductions/2009953-new-s2-avant-nothelle-n300-owner/page75

[S2_avant 19930325]

ok ,, but if i can switch wires and make it work , its better then 100 euro

[Tractor Dave]

I did find an aftermarket one that worked correctly. It's somewhere in my Nothelle thread.

[rxl]

https://shops.audi.com/de_DE/web/tradition/p/druckgeber-035919561a-10

[S2_avant 19930325]

I was researching into oil pressure sensors (for a guage - not a lamp) on the B6 S4 and discovered that the 035 919 561 fitted to the 3B/ABY/ADU is well and truly NLA.

This is the bigger/chunky 2-pin sensor that is wired onto ABY as follows:
'G' - black/white - 0..5 bar based on variable resistance - G10 on schematics

'WK' - blue/black - this is a n/c (normally closed) switch that OPENS with pressure above 0.3bar - F22 on schematics


In conjunction with the hybrid F22/G10 unit, we have 056 919 081 E as a single pin (n/o) switch that CLOSES when oil pressure exceeds 1.8bar - this is 'F1' on the schematics connected to a white/grey wire.

Both devices have an M10x1.0mm threaded fitting on the left side of the block.

The problem we have is that an alternative to the NLA part looks to be 035 919 561 A - this was fitted to many an old Golf and Audi engine (including KW, MB, NG, KV, NM & 7A), BUT it has a different setup on the switch side which prevents 'plug and play' operation.

The switch 'WK' side of the 035 919 561 A part is actually the 1.8bar n/o switch... so on S2/RS2 we will get false oil pressure warnings as the logic is back to front on our autocheck system.

The FIX is to swap the switch wiring around on the ABY and fit an alternative to the 1-pin switch in the F1 position as 028 919 081 D (or H) - these are 0.3bar n/c switches what get wired to the blue/black wire so that Autocheck behaves correctly.

If that isn't clear for anyone, I shall create a lil diagram !

Hi Paul , how do you mean it should be done ?? I think i have exactly this problem on my car. Could you make somkind of easier diagram ?? Thanks a lot.

[customizer]

Good info thanks for posting

[Error404]

I used a aftermarket VDO unit. Its the same spec except M10x1 taper thread:

http://www.s2forum.com/forum/showthread.php?t=48765&highlight=VDO+sender&page=2

[S2central.net]

Pete maybe has some of the last OE items available then - just be especially careful when sourcing aftermarket replacements - the most popular application will be on old Golfs and they will be 'wrong' for the S2/RS2 and need the fix described above.