In the past, in the event of a vehicle breakdown, the location of the fault was not easy, and it was often necessary to dismantle some parts of the engine to see which one had failed.
It was also not easy to locate various smaller problems that could lead to a more serious fault in the future. This could, for example, be the wear of some key elements that, for example, caused a drop in pressure or improper combustion of the mixture. Modern cars have many different sensors that allow you to quickly locate faults and respond to changes. The computer can also adapt some parts to certain changes, for example, they can be throttles, which can wear out over time, then the role of the computer will be to choose a different range of opening them.