Oil Pressure and Oil Pressure Checking

Oil pressure and oil pressure switch, checking
Special tools and equipment





^ VAG1342 compression tester
^ VAG1527B voltage tester
^ VAG1594A connector test kit

Note: For the functional check and servicing of the optical and acoustic oil pressure warning: Refer to Wiring Diagrams.

Test sequence





- Remove oil pressure switch F1 and install in tester.
- Thread tester into oil pan in place of oil pressure switch.
- Connect brown wire of tester to Ground (GND).
- Using adapters from VAG1594A, connect VAG1527B Voltage Tester to B+ and oil pressure switch. LED must not light up.
- If LED lights up, replace 1.4 bar oil pressure switch -F1-.
If LED does not light up:
Start engine and let run at idle: LED must light up with 1.2 to 1.6 bar positive pressure, otherwise replace oil pressure switch.

Oil pressure at idle: minimum 2 bar
- Increase engine speed (RPM) further. At 2000 RPM and an oil temperature of 80°C, oil pressure must be between 3.0 and 4.5 bar.
If specified values are not obtained:
- Repair mechanical damage, e.g. bearing damage.
- Oil filter holder with pressure valve, if necessary, replace oil pump.
Oil pressure must not exceed 7.0 bar at higher engine speeds.