Oil pressure sensor in the Golf!

Hi,
I installed a VDO oil pressure gauge with display yesterday. Here I have the original oil pressure sensor/warning sensor on the oil filter.
detached. Then I screwed in my new oil pressure sensor from VDO into the threaded hole. This has two connections: one for the analog oil pressure gauge and one for the oil pressure warning indicator.
Now the oil pressure gauge works perfectly, however, the oil pressure gauge beeps and flashes when I start the engine. Now, it might be possible that I need to add a resistor between the oil sensor and the warning light.

Animalking wrote:

Hi, I installed a VDO oil pressure gauge with display yesterday. Here I have the original oil pressure sensor/warning sensor on the oil filter. detached. Then I screwed in my new oil pressure sensor from VDO into the threaded hole. This has two connections: one for the analog oil pressure gauge and one for the oil pressure warning indicator. Now the oil pressure gauge works perfectly, however, the oil pressure gauge beeps and flashes when I start the engine. Now, it might be possible that I need to add a resistor between the oil sensor and the

.

What is the switching point of your new oil pressure sensor?
Normally, it should be screwed in instead of the sender in the cylinder head (switch point 0.25 bar). The one on the oil filter has a different switch point (I'm not sure anymore, but I think 1 bar). Also, the oil pressure at the oil filter is not very informative because the oil only starts its journey through the engine there. At the end of the oil circuit (at the cylinder head), monitoring oil pressure is much more important!!

Hi,
but the original oil pressure sensor is also located at the oil filter!!

Animalking wrote:

Hi, but the original oil pressure sensor is also located at the oil filter!!

Please read my post again very carefully!!!

{TEXT_TO_TRANSLATE}
VAG engines have had two oil pressure sensors since 1983. One at the oil filter flange and one at the cylinder head!!!!

If one turns off before the other, then the Warner will hum (just don't ask which switch was turned off first, I forgot)!

Hi Animalking,

Have you solved your problem? It has become so quiet.

Hey,
Thanks for the information!!!
I'll try to screw the sender into the threaded opening on the cylinder head. Maybe that will help! And make sure to use the original oil filter when replacing it, then it might work!

Unfortunately, the old original oil pressure sensor with the mounting bracket is no longer available. However, it should also be possible with the VDO system. However, no one knows whether the cable for the oil pressure warning indicator requires a resistor!

Okay, here's the translation:

so:

@bertil

My TDI (ALH) only has ONE oil pressure switch (on the oil filter housing).
I only know two switches, which I only used with older motors, probably from around 1990.

@animalking

The TDI oil pressure switch switches ON with oil pressure and OFF without oil pressure!

Traditional, old switches would open when there was pressure and close when there was no pressure.

...also confused me the first time I measured it...

See you, Gremlin

First of all, thank you for the information.
Now I'm just a little bit confused!
The VDO sender has connections for both the oil pressure and the warning indicator (at least that's what the seller said). Now, I simply connected the connection from the warning indicator on the sender to the old cable that was originally connected to the original sender. I didn't quite understand what you meant about the ground ? Do you mean that if I connect the cable from the oil pressure warning light to ground, it won't scream anymore? Despite everything, thank you.

Gremlin wrote:

@bertil My TDI (ALH) only has ONE oil pressure switch (on the oil filter housing). I only know two switches, which I only used with older motors, probably from around 1990.

Hi Gremlin,

My 1Z has two, the ALH of my neighbor has two, and the 110PS TDI (Seat Toledo 2000) from my brother also has two oil pressure sensors (I can remember that quickly). Should there be different versions?

@animalking

Quote:

The VDO sender has connections for both the oil pressure and the warning indicator (at least, that's what the seller said).

That's also fine...

Quote:

Now, I simply connected the connection from the warning indicator on the sensor to the old cable that was originally connected to the original sensor. I didn't quite understand what you meant by the "ground"? Please explain in more detail, do you mean that if I disconnect the cable from the oil pressure warning light, it will no longer make a noise?

The switches on the engine are switched via ground (engine block). There are switches that close when there is oil pressure, or switches that open when there is oil pressure. The latter ones you cannot use, then your alarm will sound. That was the statement made by Gremlin.
It's possible the salesperson gave you the wrong switch. That's the only way to do it.

Okay, here's the translation:

so:

Typically, the warning lamp was connected to the ignition positive. The other side went to the oil pressure switch. When the oil pressure was too low, the switch would connect its connection to ground, and the lamp would light up. -> The switch has a connection when the engine is stationary.

'Something has changed recently. The instrument panel applies 12V to the line going to the oil pressure switch. The switch now activates and connects to ground when there is sufficient oil pressure. If the line is not connected to ground, the oil pressure warning light comes on. -> The switch does not have a connection when the engine is stationary.'
Advantage of this circuit: Cable breakage is reliably detected!

Just connect a multimeter to the switch if you're unsure.


See you, Gremlin

Received today from VDO:

Based on our knowledge, the oil pressure warning light briefly illuminates when the ignition is turned on and at the latest when the engine starts.

If the oil pressure light is still on even when the engine is running, it's possible that the wrong switch has been replaced.

For any further questions, please do not hesitate to contact us.

Best regards

Uwe Hofmann

Siemens VDO Trading GmbH

Hmm, if I simply disconnect the sensor cable for the oil pressure warning indicator and leave it hanging loosely, the warning light will NOT beep when the ignition is turned on, however, if I start the engine and drive for about 1 minute, it will beep. If I now attach the cable to the VDO unit, it starts making noise even with the ignition on and it doesn't stop!!!

@Animalking

Zefix, please finally measure the old oil pressure switch and the VDO oil pressure switch to determine whether it's an open or closed circuit! Then check the switches and that's it!

Where is the problem? Did you throw away the old oil pressure switch? -> Bad...

Yes, the master is gone!

P.S: Don't be so mean

So habe den Geber nun ausgemessen!
When the engine is stationary and the ignition is switched on, the sender switches to ground. However, when the engine is running, it works exactly the opposite!
Should I now replace the donor?
When the ignition is off, the light turns on, and when the engine is running at idle, it does NOT light up! However, if the engine speed exceeds 2000 and the oil pressure reaches approximately 5 bar, the light will illuminate again, but it will go out after the engine speed is reduced again!