Fullback Diesel Fuel Pressure Sensor

That sounds like a potential fuel delivery issue. Rough running and stalling are classic symptoms. Since you mention the check engine light, have you had it scanned for specific codes? That would really help narrow it down. How's your fuel economy been lately? When you checked the wiring, did you happen to check the plug contacts for corrosion?

Thanks for the quick reply! I haven't scanned it yet. I wanted to get some opinions first before heading to the mechanic. Fuel economy does seem a bit worse than usual. As for the wiring and plug, I only gave them a quick visual inspection. Should I try cleaning the contacts with some electrical contact cleaner?

Getting the codes read is the best first step. The change in fuel economy reinforces the fuel system suspicion. Cleaning the contacts is worth a shot; it's a cheap and easy fix if that's all it is. But honestly, with those symptoms, a failing fuel pressure sensor seems likely, especially given the age and mileage. A workshop might be the best shout, they'll have diagnostic tools to properly test the circuit.

Thanks for the advice! I cleaned the contacts, but the problem persisted. I took it to the workshop, and it turned out the fuel pressure sensor was indeed defective, most likely caused by a defective connection - just like I initially thought anyway! New sensor and labor cost me 95€. All good now!