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 kit (VAG 1594A) or (VAG 1594C)

• Engine oil level OK.

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

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





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

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

- Connect the (VAG 1527B) using adapter cables from the (VAG 1594C) to B+ and to the oil pressure switch.

Light Emitting Diode (LED) must not light up.

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

If the LED does not light up:

- Start engine and increase engine speed.

The LED must illuminate at 1.2 to 1.6 bar positive pressure, otherwise replace the oil pressure switch.

- Increase engine speed further.

At 2000 Revolution Per Minute (RPM) and an oil temperature of 80 °C, 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 e.g. bearing damage can also be the cause of too low oil pressure.

If no malfunction can be found:

- Replace the oil pump, refer to one of the following:

• Engine codes BGP, BGQ and BTK, refer to --> [ Oil Pump, Engine Codes BGP, BGQ and BTK ] .

• Engine codes CBTA and CBUA, refer to --> [ Oil Pump, Engine Codes CBTA and CBUA ] Oil Pump, Engine Codes CBTA and CBUA.

If the specification is exceeded:

- Check the oil passages.

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