Ok perhaps the example was a little off due to design abuse from some manufacturers. For example (I think) Alfa Romeo put the gas light on if the fuel cap is lo

Ok perhaps the example was a little off due to design abuse from some manufacturers. For example (I think) Alfa Romeo put the gas light on if the fuel cap is loose/missing. This is more of an appropriate design. (Unless it's a diesel then it really is a problem) The point that I was trying to address is that if there is a critical warning that you can't do anything about, there's no more info needed than 'stop and seek help' which is perfectly served by a simple light. Or do you want a 1 page problem statement to flash up on the dash and explain why you really need to pull over. The only reason you would do such a thing is if you wanted the user to make the evaluation of whether or not it is important or something that can be ignored.