Aygo Diesel Stalling Idle Low Power

I had very similar symptoms with my Aygo: rough idle, engine light, and a noticeable drop in performance. Have you checked the fuel pump relay and pressure sensor? Could also be a dirty fuel rail or reduced fuel efficiency. Look at those before assuming the worst.

Could you elaborate on which specific symptoms your Aygo exhibited, and if there were any other related problems? I am trying to determine if our issues align closely enough.

The stalling at idle was definitely the most consistent symptom, along with the engine light. The reduced power was most noticeable when going uphill. I initially suspected the fuel pump, but my local workshop traced it back to the fuel pressure regulator. Given your error entry after changing the fuel filter, I would strongly suggest having it professionally diagnosed.

Thanks, I visited a local workshop, and they confirmed it was indeed the fuel pressure regulator, which has been replaced and fixed the issue. The repair cost was 45€. Your insights were invaluable.