Oil -- Oil Level Control Error

Hello everyone, my car is a 2012 1.4 HDI Activ 207. When the ignition is turned on, the "Oil Check" screen on the instrument panel remains on. I've done some research on this. Thinking the oil was too much, I drained 1 liter, but the problem persisted. Of course, I topped up the oil level, checking it thoroughly. The dipstick shows the correct level. According to the manual, this warning means the oil gauge is faulty. As you know, we're on a large forum, so I'd appreciate any responses from those who've experienced it before, checked it, and have suggested solutions. Thank you for reading.

Two or three years ago, a friend and I decided to change the oil and filter ourselves in our 207. We poured a high-quality brand of oil into it, let it run for 10 minutes, then drained the oil and left the plug open overnight to drain all the oil. We also changed the filter ourselves. We closed the plug and poured out the oil. Shell oil is 5 liters, but we only added about 4. We started the car and it gave an oil error. We searched online and it said the amount was too much. We measured the remaining oil, which was 1 liter. Everything was correct. No, the error didn't go away. Finally, we drained the oil into a clean container and measured it. Everything was correct. We poured it back in, disconnected the battery terminals, and reconnected them half an hour later. It was fixed. In other words, the sensors in our Peugeots can sometimes go haywire. Or, if we don't delete a fault from the computer once, it might not clear the memory. Of course, an oil fault is no joke. In such cases, I first try to determine if the oil pump is clogged or if it's pumping properly. I do this by checking the dipstick in the morning while the car is on level ground. I reinstall it, start the car, and then check again. If the dipstick level drops after starting the car, it means the pump is working and pushing oil into the passages, causing the oil level in the crankcase to drop. Otherwise, if you're certain it's not too low or too high, the rest seems to indicate a sensor failure.

Thanks for your help. A few hours ago, based on my own research, I purchased an oil level sensor. It's shaped like an antenna and mounts using an "A"-shaped stud from the top down under the engine block. The part I purchased today, December 22, 2023, is not original and cost 380 TL. The problem persisted after the initial installation, but I received the Oil OK warning shortly thereafter. This resolved the issue.

I hope it's a sensor failure, I guessed right. These vehicles have brought us to this point :) By the way, if the part is Delphi or something, it won't cause any problems. But if it's a really crappy brand, the sensor may fail again after a certain period of time.

The problem has been found, which is good news. If you find yourself in the same situation again, you will be able to solve the problem with an original part or a part close to it. Best regards, forums.