C1 fuel rail pressure sensor issue

I had something similar with my C1. Symptoms sound identical! Did you check the wiring to the fuel pressure sensor itself? Sometimes the connectors get corroded, or a wire gets chafed. If the wiring looks okay, the sensor is likely faulty and needs replacing.

Thanks for the quick reply! I gave the wiring a quick look-over, and it seemed okay, but I will check more carefully. Where exactly is the fuel rail pressure sensor located on the C1? Is it easy enough to get to for a proper inspection?

Yes, the sensor is accessible. It's on the fuel rail itself, but access is tight. Given the symptoms and the error code you got, I strongly suspect it's the sensor, but get a proper diagnosis before replacing parts. Take it to a trusted workshop and have the signal checked professionally. It can save you a lot of trouble and money.

I took your advice and went to the workshop. You were spot on! They confirmed the fuel rail pressure sensor was defective. A new sensor was fitted, the code was cleared, and it's running like a dream again! It cost me 240€ all in, parts and labor. Thanks a million for the pointer!