So my car started juddering and the engine warning light came on whilst I was driving. I pulled over and called the AA. The guy tried to hook his laptop up to the car but either the car's socket was faulty or his laptop connector was. Either way, it wouldn't connect to give him a fault code.
He manually found the fault in one of the spark coils and replaced it and charged me £45. Car's fine now but the warning light hasn't gone off
Here's the kicker though: he said that once one spark coil has malfunctioned, be prepared to have to replace them all as once one goes, its likely the others will too... Is this true?