If the oil pressure lamp at Audi 100 C4 does not extinguished after starting the engine, the oil temperature is too high. In this case, the light bulb shall be extinguded when the gas pedal is pressed and the engine is increased. If this is not the case, the following are possible causes:
- Low oil level;
- The oil pressure transducer was gone.
- The oil pressure sensor is not right.
- The filter of the oil pump or oil pump is grailed.
- The safety valve is contaminated.
- Nipplings of bearings.
