What does reduced engine performance mean on a Volvo S60 mean?

Reduced engine performance on a Volvo S60 typically indicates that the vehicle's engine management system has detected a problem, prompting it to limit power output to prevent further damage. This can be caused by various issues, such as a malfunctioning sensor, a clogged air filter, or problems with the fuel system. Drivers may experience decreased acceleration, rough idling, or the illumination of warning lights on the dashboard. It's advisable to have the vehicle diagnosed by a professional to identify and resolve the underlying issue.