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Oil Pressure Sender: Testing and Inspection






Oil Pressure and Oil Pressure Switch, Checking






Special tools, testers and auxiliary items required

Oil pressure gauge (V.A.G 1342)

Voltage tester (V.A.G 1527 B)

Connector test kit (V.A.G 1594 C)

Test Conditions

Engine oil level OK

Engine oil temperature at least 80 °C (radiator fan must start up once).

For information on checking the function and servicing the visual and acoustic oil pressure display, refer to and => vehicle tester "Guided Fault Finding"; "Function and Component Selection".

Perform the following:

- Remove the oil pressure switch (F1) and install it into the tester.






- Thread oil pressure gauge into oil filter bracket in place of oil pressure switch.

- Connect brown wire on the tester to the ground (-).

- Connect voltage tester (V.A.G 1527 B) using adapter cables from connector test kit (V.A.G 1594 C) to B+ and oil pressure switch.

LED must not light up.

If the LED lights up:

- 1.4 bar Replace the oil pressure switch (F1).

If the LED does not light up:

- Start the engine and increase the RPM.

The LED must illuminate at 1.2 to 1.6 bar. Replace the oil pressure switch if it does not.

- Increase engine speed further.

At 2,000 RPM and an oil temperature of 80 °C, the oil pressure must be 2.7 to 4.5 bar.

At higher engine speeds oil pressure must not exceed 7.0 bar

If the specifications are not obtained:

- Correct mechanical damage, e.g. bearing damage.

- Replace oil filter bracket with pressure valve, or oil pump.

If the specification is exceeded:

- Check oil channels.

- If necessary, replace oil filter bracket together with pressure relief valve.