XC40 Diesel Engine Stalling

My 2018 Volvo XC40 diesel with 66513 km has the check engine light on and occasionally stalls at idle. I've also noticed reduced engine power. I checked the fuel lines and filter after recently changing it. I suspect a faulty fuel pressure regulator, maybe triggered by an error when I replaced the fuel filter. Has anyone had similar symptoms with the XC40 diesel and can offer insight into troubleshooting this fuel pressure issue?

4 comment(s)

Sounds like the fuel pressure regulator. Is the idle rough? Could be fuel efficiency dropping too. Check the fuel rail pressure sensor readings if you can.

The idle is noticeably rough, and I think fuel efficiency has diminished slightly. What specific fuel rail pressure sensor readings should I be looking for, and what's the acceptable range? Also, how hard is it to replace the fuel pressure regulator itself on this engine?

If idle is rough, and you're seeing reduced power, it's pointing to the regulator. I wouldn't replace it yourself without proper tools. An error entry after fuel filter replacement is very likely the cause. Get it checked by a workshop, might be a quick fix or just a reset.

I took it to a workshop, and they confirmed the fuel pressure regulator was defective, likely due to the error entry. The repair was 45€, including parts and labor. The XC40 is running smoothly again. Thanks for pointing me in the right direction!

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