V60 rough running

Hey there! I had a similar problem with my V60, though mine's a bit older. Rough running and the check engine light are definitely no fun. That "reset quantity drift compensation" error sounds familiar. Did you notice any other symptoms, like difficulty starting or excessive smoke? The fuel injection system is super sensitive to even minor issues, and bad fuel injectors can cause all sorts of mayhem. Have you checked the basics like fuel filter and air filter, or run any onboard diagnostics beyond just pulling the codes?

Thanks for the quick reply! Starting hasn't been an issue, and I haven't noticed excessive smoke, but the rough running is definitely persistent, especially at idle. I did replace the fuel filter recently, thinking it might be that, but no luck. The air filter is also clean. I used an OBD II scanner to read the codes, but haven't done any advanced diagnostics. Any specific tests you'd recommend?

Okay, so no starting issues or smoke is good. Given you've already checked the filters, and the error code is pointing to quantity drift, it's highly likely an injector is faulty. Honestly, without specialized tools and knowledge of Volvo's fuel injection system, further DIY diagnostics might be tricky. It sounds like it's time to bite the bullet and take it to a reputable workshop. They can perform injector tests, check the wiring, and properly diagnose the root cause. Don't delay it too long, because a faulty injector can potentially damage other components.

Thanks so much for the advice. I was hoping to avoid the workshop, but it sounds like that's the best course of action. I took it to a trusted mechanic, and it turned out to be a defective injector, just as suspected. The repair, including a new injector and the labor cost, came to around 515€. It runs smoothly again! Appreciate your help in pointing me in the right direction!