Passat Wagon L4-2.0L Turbo (CCTA) (2009)
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Thread oil pressure gauge into oil filter bracket in place of oil pressure switch.
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Connect brown wire of tester to Ground (GND) (-).
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Connect voltage tester (V.A.G 1527B) using adapter cables from connector test kit (V.A.G 1594C) to B+ and oil pressure switch. LED must not
light up.
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If LED lights up, replace 1.4 bar Oil Pressure Switch (F1).
If the LED does not light up:
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Start engine and increase engine speed: LED must light up at 1.2 to 1.6 bar positive pressure, otherwise replace oil pressure switch.
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Increase engine speed further. At 2000 rpm and an oil temperature of 80 °C, the oil pressure should be between 2.7.. 4.5 bar.
At higher engine speeds oil pressure must not exceed 7.0 bar
If the specification is not obtained:
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Check screen in oil intake pipe for soiling => [ (Item 17) Suction line ] See: Engine, Cooling and Exhaust/Engine/Engine Lubrication/Oil
Pan/Service and Repair/Oil Pan, Oil Pump, Assembly Overview.
‹› Also, mechanical damage e.g. bearing damage can also be the cause of too low oil pressure.
If no malfunction can be found:
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Replace oil pump => [ Oil Pump, Removing and Installing ] See: Engine, Cooling and Exhaust/Engine/Engine Lubrication/Oil Pump/Service and
Repair.
If the specification is exceeded:
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Check oil channels.