A pressure gauge used to check engine oil pressure and the functionality of the oil pressure sensor
- A - oil pressure sensor
- 3 - pressure gauge ground wire
To check, you need a pressure gauge, which can be screwed in instead of the oil pressure indicator sensor. The oil pressure indicator sensor is located on the oil filter holder.
Execution order
1. Check the oil level and top up if necessary.
2. Start and warm up the engine. The oil temperature should be about +80°C. This temperature is reached if the coolant temperature gauge shows normal operating temperature.
3. Remove the relay (A) from the oil filter holder and screw it into the pressure gauge.
4. Screw a pressure gauge into the engine instead of the pressure indicator sensor.
5. Connect the brown wire –3– of the AUDI control unit to ground (–) (V.A.G 1342).
6. Connect the LED test lamp with an auxiliary wire to the positive (+) cable of the battery.
7. Start the engine and slowly increase the engine speed. When the oil pressure set for the engine is reached, (refer to Specifications) the LED should go out, otherwise replace the pressure gauge sensor.
8. Increase engine speed. At 2000 rpm and oil temperature +80°C, oil pressure should be at least 2.0 bar
9. Lower oil pressure indicates damage to the oil pressure valve, oil pump, or worn crankshaft bearings.
10. When the engine speed increases, the oil pressure should not exceed 7.0 bar. Otherwise, the oil pressure valve must be replaced.
11. Install the pressure indicator sensor and tighten it to a torque of 25 Nm. If the seal is damaged, replace the sealing ring.