Oil Pressure Sender: Testing and Inspection

Oil Pressure and Switch, Checking

• To check the oil pressure on a Jetta from MY 11, refer to "Guided Fault Finding" in the vehicle diagnostic tester.

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 A) or (V.A.G 1594 C)

• Engine oil level is OK.

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

• For information on checking the function and servicing the visual and acoustic oil pressure display, refer to and to "Guided Fault Finding"; "Function and Component Selection" in the vehicle diagnostic tester.

- Remove the oil pressure switch (F1) and install it into the oil pressure gauge.






- Thread the oil pressure gauge into the oil filter bracket in place of the oil pressure switch.

- Connect the brown wire from the tester to Ground (GND).

- Connect the voltage tester (V.A.G 1527 B) using an adapter cable from the connector test set (V.A.G 1594 C) to B+ and the oil pressure switch.

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

- If the LED lights up, replace the 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 engine speed further.

• At higher engine speeds the oil pressure must not exceed 7.0 bar

• At 2,000 RPM and an oil temperature of 80 °C (176 °F), the oil pressure must be 2.7 to 4.5 bar.

If the specification is not obtained:

- Check he screen in the oil intake pipe => [ (Item 22) Oil Intake Pipe ] Service and Repair 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, refer to the following:

• Engine codes CBTA and CBUA, refer to => [ Oil Pump ] Service and Repair.

If the specification is exceeded:

- Check the oil passages.

- Replace the oil filter bracket, if necessary.