Mazda 2 wrench light coming on and off

I bought a used 2011 Mazda 2 Tamura a week and a half ago from a used car dealership. Within a few days, the wrench light came on so I brought the car to a mechanic and he said the coolant was the issue so he replaced the coolant. The car was also serviced by the dealership before it was bought. However, the wrench light is still coming on, but it will come on for a few minutes while driving and turn off again while I’m still driving. What could this mean? Edit: The car has a 1.3 petrol engine for context, is there common issues with this model that could be causing the light to appear and disappear?