My 2013 J10 QQ has developed a "Start Stop System Fault". I've read several topics here and elsewhere about how to diagnose and fix the problem but there is nothing I can find that is a conclusive way to diagnose and fix the problem.
It seems that a likely cause of the fault is the battery and that replacing the battery may solve the problem. However the batteries for start stop cars are quite expensive so I dont really want to buy one just on the off chance.
Failing that, does anyone have a conclusive way to diagnose a start stop system fault? I appreciate I could take it to the dealer but I suspect that they would charge quite a lot just for plugging it into a laptop!
I don't know if they are good enough to check stop start batteries, but Halfords do a free battery test, they have a machine which connects to your battery and gives you a printout.