2009 VW Fox.
I’ve taken my car to the garage a couple times now and had no success in figuring out the problem. A few months ago my car started to drive differently, it was shuddering and felt like it had lost its power but there was no engine light and the mechanic told me there was nothing wrong. More recently the engine light comes on every now and then and the car still feels weak to the point where I’m nervous to drive it. Yesterday I took it to a mechanic (engine light was on as I drove there), they ran diagnostics and told me there was nothing wrong and to come back when the engine light shows. The light seems to come on and off completely randomly, but the car feels so weak I don’t even like driving for 5 minutes in it but I keep being told nothing is wrong.
Any ideas on what this could mean? Or any tips on making the engine light show so i can take it to the mechanic again?