Hey, I had a similar problem with my Peugeot 308 from 2008, but in my case the engine control unit was defective. I also had the check engine light on all the time and the engine just stopped. After I took it to the garage, the guys discovered that the engine control unit had to be replaced. This was a serious problem, because without a properly functioning ECU, the engine simply won't run properly. But after the repair, the car ran like clockwork again. So it could be that you have a similar problem. I would recommend having it checked by a mechanic, it could also be the engine control unit. Let me know what you find out!

(Translated from German)

Hey, thanks for the answer! Sounds like it could actually be the engine control unit in my Peugeot 307. Do you remember how much the repair cost you? And have there been any other problems since then or is everything running smoothly now? I'd be happy to hear your feedback!

(Translated from German)

Yes, the mechanic actually discovered that the engine control unit was defective. Since the repair, I've had no more problems with it. So the coding error that you first suspected was fixed. But it cost me something for the fun. I had to pay a whopping 1000 euros for the repair of the engine control unit. Not exactly a bargain, but that's just part of driving a car, isn't it? Since then, the car has been running like a kitten again and doesn't make any more trouble. I hope you'll be just as happy! Let's hear what you come up with!

(Translated from German)

Thanks a million for the useful information! Sounds like a lot of money, but to be honest, I would have expected even more. The main thing is that the car runs again afterwards and I don't have to keep thinking that it could break down again at any moment. All right, I'll make an appointment with the mechanic and check it out. Aggro, cars always have to be so stressful, don't they? I'll let you know when I know what's going on!

(Translated from German)