hi, I am new to this forum so apologies if this subject has been approached before. The stop-start function on my car works ok but every now and again when I start the car, I get a fault message. if I turn the car off and on again, it works ok. This is happening more frequently now and it's getting annoying. Does anyone know how easy it is to fix this problem? Is it something I could look at myself, or am I looking at pricey garage bills?