Oil Pressure And Oil Pressure Switch, Checking

WARNING: This page is about a different car, the 2009 Audi TT and 2008 Audi TT. However, it is still accessible from the selected car via links, so may be relevant.

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 C

Test Prerequisites

Engine oil level OK, checking, refer to Maintenance Procedures.
The oil pressure warning lamp must light up for approximately 3 seconds when the ignition is switched on.
On vehicles with Auto-Check-System, the indicator "OK" must light up (check symbol).
Engine oil temperature at least 80 °C (176 °F) (radiator fan must start up once).

Test Sequence

For the correct tightening specifications, refer to OIL FILTER BRACKET OVERVIEW

-- Remove the oil pressure switch -F1- and screw it into oil pressure gauge.

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

Courtesy of AUDI OF AMERICA, LLC

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

-- Connect brown wire of tester to Ground (GND).

-- Connect the V.A.G 1527 B using adapter cables from the V.A.G 1594 C to battery positive and oil pressure switch. LED must not light up.

-- If LED lights up, replace 1.4 bar oil pressure switch.

If the LED does not light up:

-- Start engine and increase engine speed: LED must light up at 1.2 to 1.6 bar positive pressure, otherwise replace oil pressure switch.

-- Increase engine speed further. At 2000 RPM and an oil temperature of 80 °C (176 °F), the oil pressure should be between 2.7 bar and 4.5 bar.