Oil Pressure Sender: Testing and Inspection

Oil Pressure and Switch, Checking

Special tools, testers and auxiliary items required

• Oil pressure gauge (VAG 1342)

• Voltage tester (VAG 1527B)

• Connector test set (VAG 1594C)

• Engine oil level OK.

• Engine oil temperature at least 80 °C (176 °F) (radiator fan must start up once)

• Functional testing and repairs on optical and acoustic oil pressure indicator. Refer to and => vehicle diagnosis, testing and information system (VAS 5051) "Function/component selection".

- Remove the noise insulation. Refer to

- Remove the oil pressure switch and install it to the (VAG 1342).





- Install the (VAG 1342) into oil filter bracket in place of the oil pressure switch.

- Connect the brown wire of the (VAG 1342) to ground.

- Connect the (VAG 1527B) using adapter cables from the (VAG 1594C) to the battery positive and to the oil pressure switch. The Light Emitting Diode (LED) must not light up.

- If the LED lights up, replace the 1.4 bar, oil pressure switch.

If the LED does not light up:

- Start the engine and increase the engine speed: The LED must illuminate at 1.2 to 1.6 bar. Replace the oil pressure switch if it does not.

- Increase the engine speed further. At 2000 RPM and an oil temperature of 80 °C (176 °F), the oil pressure must be between 2.7 and 4.5 bar.

At higher engine speeds oil pressure must not exceed 7.0 bar

If the specification is not obtained:

- Check the screen in the oil intake pipe for contamination.

• Also, mechanical damage for example, bearing damage can also be the cause of too low oil pressure.

If no malfunction can be found:

- Replace the oil pump with balance shaft drive. Refer to => [ Oil Pump with Balance Shaft Drive ] Oil Pump with Balance Shaft Drive.

If the specification is exceeded:

- Check the oil passages.

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