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.