I agree too, a good article. But he is being slightly disingenuous. It is obvious why there is the current situation. Depends whether you see it from the customer's point of view, or the 'trade' point of view! Even if the relevant code were indicated, it's only D-I-Y spannermen and the like that would be able to either sort the problem themselves or take it to a mechanic with the fault pre-diagnosed. As we know, "of your Ã‚Â£150 bill, Sir, the Ã‚Â£100 of it is for knowing where to look". So basically it comes down to the public needing to be able to trust 'the trade', or, of course, attend a nano meet!