Engine Oil Pressure: 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)

• Vehicle diagnostic, testing, and information system (VAS 5051)

Test Prerequisites

• Oil level is OK

• Engine oil temperature is approximately 80° C (176° F)

Checking the Oil Pressure Switch

- Disconnect the electrical connector - arrow - from the oil pressure switch (F1).





- Remove the oil pressure switch.

- Install the (VAG 1342) with the (VAG 1342/14) to hole for the oil pressure switch.





- Install the oil pressure switch - 2 - into the (VAG 1342).

- Connect the brown wire - 1 - from the (VAG 1342) to a known good ground.

- Connect the (VAG 1527B) using adapter cables from the (VAG 1594A) to the oil pressure switch and the battery positive terminal.

• Light Emitting Diode (LED) must not light up.

- If the LED is lit, replace the oil pressure switch.

- Start the engine.

• While starting engine, watch the (VAG 1342) and LED as the oil pressure switch may open during start.

Black Oil Pressure Switch

• At 1.2 to 1.6 bar pressure, LED must light up.

- If LED is not lit, the oil pressure switch must be replaced.

Oil Pressure, Checking

- Disconnect the electrical connector - arrow - from the oil pressure switch.





- Remove the oil pressure switch.

- Connect the (VAG 1342) with the (VAG 1342/14) to the hole for the oil pressure switch.





- Install the oil pressure switch - 2 - into the (VAG 1342).

- Start the engine (engine oil temperature approximately 80° C (176° F)).

• Oil pressure at idle: at least 1.0 bar

• Oil pressure at 2000 RPM: at least 3.5 bar