Citroen C2 Stalling After Fuel Filter Change

Sounds familiar. I had similar problems with my C2. Those symptoms – check engine light, stalling, power loss – could point to a fuel pressure regulator issue. Did the problems start right after you changed the fuel filter?

Yeah, it started almost immediately after I swapped the fuel filter. What exactly does the fuel pressure regulator do, and how would changing the filter cause it to go bad? Is it something simple I can check myself, or am I better off taking it to a shop?

The fuel pressure regulator maintains consistent pressure in the fuel rail – that’s the thing that supplies fuel to the injectors, which spray it into the engine. If it's faulty, you get misfires or rough running due to incorrect fuel mixture, or stalling. I'd suggest getting it checked. Could be a pressure sensor too, but I'm betting on the regulator. I'd take it to a workshop.

Thanks for the advice! I took it to a local workshop, and you were spot on – it was the fuel pressure regulator. They replaced it, and the car is running perfectly again. Cost me about 45€ all in. I guess the filter change messed it up somehow. Appreciate the help!