XC70 System readiness check incomplete error

I am familiar with this issue, although I cannot say I know the build year of my XC70. The system readiness is a set of tests your car runs to ensure the emissions systems are working correctly. When you use an OBD2 scanner, it sometimes resets these readiness monitors. They need to run and complete before you can pass an emissions test or vehicle inspection. Try driving the car through various conditions (highway, city, stop-and-go) for a few days. The monitors should eventually set.

Thanks for the quick reply! I've driven it a bit since, but the error is still there. How long does it usually take for these monitors to reset, and is there a specific drive cycle I should follow?

Confirming that, according to my experience, sometimes certain drive cycles are required, and other times, the issue persists despite multiple attempts. In your situation, considering that the error remains, I would suggest consulting with a workshop, as it is possible that the OBD2 scan has affected some of the settings. Please be aware that some of these settings are automatically tested by the vehicle itself, which may not be possible if those settings are compromised. They can check the readiness monitors with their diagnostic tools and advise you if there's an underlying problem preventing them from setting.

Thanks a lot for the advice! I took it to my local workshop, and it turned out the readiness flags just needed to be reset using their professional diagnostic tool. No actual fault, and no cost involved! Appreciate your help.