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 set V.A.G 1594 C

Test conditions:
^ Engine oil level OK.
^ Engine oil temperature at least 80°C (radiator fan must start up once).

Test sequence:





- Remove oil pressure switch F1 and install into oil pressure gauge.
- Install oil pressure gauge V.A.G 1342 into oil filter bracket in place of oil pressure switch.
- Connect brown wire of tester to Ground (GND).
- 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 LED lights up, replace 1.4 bar Oil Pressure Tester V.A.G 1342. If LED does not light up:
- Start engine and let run at idle: LED must light up at 1.2 to 1.6 bar positive pressure, otherwise replace oil pressure switch.
- Check oil pressure at different speeds:
2000 RPM: 2.7 to 4.5 bar
Above 2000 RPM: maximum 7.0 bar

If specifications are not obtained:
- Correct mechanical damage, e.g. bearing damage.
- Replace oil filter bracket with pressure relief valve or oil pump.

At higher engine speeds oil pressure must not exceed 7.0 bar

If specification is exceeded:
- Check oil channels.
- If necessary, replace oil filter bracket with pressure relief valve.