oil level (oil ok) error (oil -)

Every time I start my car, it says "OIL OK" and then returns to KM where there is trip. But when I started my car yesterday evening, it always wrote OIL - where it says OIL OK and it starts blinking. I immediately got out and measured the oil level of the cold engine. It turned out low. This morning I went, the master said we need to add 1 lt of oil. We've added. But when I started the car it gave the same warning. Since I was about to be late for work, I was not tampered with. But my mind is now there. Why do I still see the text "OIL -" despite adding oil?

Don't trust him too much, my teacher, the oil level is full in the oil level, the manager is defective or if the vehicle is not flat, I cannot measure from it.

Peugeot do not rely on this electronics. Trust what the dipstick says.

oil amount max. when it is over, it gives the warning. Sometimes I was getting a similar warning in my C2.

do not rely too much on the oil sensor. sometimes he can say that there is a problem. Even if you change the sensor, you may encounter the same problems as the part is problematic. & nbsp;

I also changed the oil, the master put more oil, oil - wrote, how we can fix this situation.