Peugeot 207 rough idle stalling jerking

Sounds familiar. Rough idle, stalling, and jerking point towards fuel delivery problems. Before you replace the sensor, have you checked the wiring and connectors going to the fuel pressure sensor? A loose or corroded connection can cause all those symptoms and trigger the check engine light.

Good point! I suspected the sensor itself, but you're right, it could be the connection. Where exactly should I be looking for these connections on the 207? Are there any common trouble spots?

Yes, the connections are a common issue. Given all of the symptoms you're experiencing, a defective fuel pressure sensor caused by faulty cable connections is very likely. I would recommend having the car checked in the workshop.

Thanks for the tip! You were spot on about the wiring. Took it to the shop, and it turned out to be a corroded connector on the fuel pressure sensor. They cleaned it up and secured it properly, and the problem's gone. Cost me 95€, much better than a new fuel pump! Appreciate the help.