Cause | Method of elimination |
The indicator lamp does not flash after the ignition is turned off | |
| The 0.3 bar mass pressure sensor is faulty (brown insulation) | Turn on the ignition, disconnect the wiring from the oil pressure sensor and connect it to ground. If the indicator lamp flashes, replace the sensor |
| No current supply to the sensor | Check the wiring and connections |
| The control lamp is faulty | Replace the indicator lamp |
| The control device is faulty | Replace the control unit. The control unit is located behind the instrument panel |
The indicator light does not go out after starting the engine | |
| The oil is very hot | If the control lamp goes out after gas is supplied, everything is normal and no repair is required |
TOthe control lamp does not go out after gas is supplied or lights up while driving | |
| Oil pressure too low | Check the oil level, top up if necessary; check oil pressure as prescribed |
| The wiring of the 0.3 bar oil pressure sensor shorted to ground | Disconnect the wire from the sensor, isolate and set aside (do not apply to mass), turn on the ignition. If the indicator light comes on, check the wiring |
| Oil pressure sensor 0.3 bar is faulty | Replace the sensor |
The indicator lamp flashes while driving and a sound signal is emitted | |
| Oil pressure sensor 1.8 bar (gasoline engine) or 0.9 bar (diesel engine) out of order | Check the oil pressure, check the oil pressure sensor. If the oil pressure is OK and the buzzer sounds, you can briefly disconnect the wiring and connect it to ground to continue driving. If the buzzer continues to work, remove the control relay from the frame. Without delay, check the oil pressure sensor and the control unit, replace if necessary |
Oil pressure too low at all speeds | |
| Too little oil in the engine | Add engine oil |
| The pump suction strainer is dirty | Remove the oil pan, clean the intake screen |
| The oil pump is worn out | Remove the oil pump and check, replace if necessary |
| The main bearings have failed | Remove the engine and repair it |
Too low oil pressure at low revs | |
| The pressure control valve is stuck in the open position due to contamination | Remove and check the valve |
Oil pressure too high at speeds above 2000 rpm | |
| The control valve does not open due to contamination | Remove and check the valve |
(The original article is posted on the website VWmanual.ru)
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