Hi all. I've been reading various threads on timing chains, solenoids and confusion with the causes of fault codes. I could do with clarification from anyone who has experienced the same issue as my 2.2 brera. For the past year or so the I've experienced intermittent lack of power accompanied by a louder exhaust noise. After a few minutes it would suddenly clear and the car would be back to normal. For 2 days now the "have engine checked" light has been on although it's running fine at the moment. Obviously there's something wrong with the intermittent issue which I've been ignoring. I've ordered a cheap OBD reader, but does anyone know what those symptoms are caused by and if so what code I should look for? I don't want to risk taking it to a garage and being told it'stretched chain when it's not as I believe has happened to others.