Oil Pressure And Switch, Checking

WARNING: This page is about a different variant/trim than selected.

NOTE:

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

Special tools and workshop equipment 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)

NOTE:

For information on checking the function and servicing the visual and acoustic oil pressure display, refer 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.

Fig 1: Identifying Diode Test Lamp V.A.G 1527 B And Auxiliary Cables V.A.G 1594A Connected To Battery Positive (+) And Oil Pressure Switch

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- 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 for contamination, refer to "Oil Intake Pipe" in item: 22.

NOTE:

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 one of the following:

Engine codes BGP and BGQ, refer to OIL PUMP .
Engine codes CBTA and CBUA, refer to OIL PUMP .

If the specification is exceeded:

-- Check the oil passages.

-- Replace the oil filter bracket, if necessary.