Driving the Cayman S yesterday and "Reduced Engine Power" appeared on the OCD. What an understatement. The car became gutless. Anyway, phoned the service centre & the Techie said I am in need of a software update but they need the car for a whole day as it can only be done when the engine & gearbox are cold. Has anyone had something similar & why does the engine & gearbox need to be cold for the update

Regards

Gilmour

2010 Cayman S