I have a 2015 Mazda6 GT wagon 2.5 petrol with nearly 60,000 km on it. It is booked in for its service in the next week. Today, the check engine light came on. In addition, the cruise control failed to activate and the i-stop stop/start feature failed.
Are all these things interconnected in that an issue with one will disable the functioning of the others?
It’s likely to be one problem that is causing all of the issues you mention. It needs a diagnostic check to locate the cause.