Older cars that are still on the road may have to be registered as a classic or antique car. In doing so this means that the car will be prevented from driving more than a certain amount of miles each year, along with restricted use of the vehicle. This is if you live in a state that requires emissions inspections regardless of the age of the car since older cars emit higher levels of pollution. In New York State a vehicle can be exempt from the emissions test when a car is more than 25 years old or has historic license plates, which in itself identifies the car as not being used on a regular everyday basis.
OBD III is currently in discussion from where this all originated in California. Factors in this decision include: reducing the time in the detection of an emissions problem and subsequent repair. But hey, if you ain't got no money to fix the damn thing, unless you get one of those extended warranties to cover such costs then OBD IV, should enable you to swipe your phone reader for payment credit that you can then pay your auto repair person on installment for fixing your ride. Anyways, if an OBD III reader or scanner detects a problem that information is then provided to a regulator and then the vehicle owner is contacted to get the car repaired. This would eliminate those see that there is a car problem and decide to do nothing about it. But I just think that for many people if time is not a factor in getting car repairs then of course it is aggravation along with the cost. Instead of an OBD III regulator calling someone who really does not need to be dictated to that the check engine light is on, because they can probably see that, but need the money for other things like rent and food; the OBD III should do the following to save time and money: alert the owner of the car by their sophisticated tracking system that the car will either pass or fail their state inspection based on the car's readiness outputs such as the fuel system, catalyst, air system, oxygen sensor and heater, exhaust gas recirculation, evaporative system ect.. The OBD III will be able to run these self diagnostic tests automatically or periodically, however you prefer from within your cars diagnostic instrumentation or mobile phone. OBD III should also have a backup battery reserve and sensor that allows the OBD III component to save and retrieve information from a car, so that an OBD III test and diagnostics can be performed without the car's engine being turned on. This is so that if the car battery has a problem, all information can be retrieved regarding of vehicle issue. CAN bus has the world already in a smoke- so why don't we use it further for OBD III!