Using specialised software and tools, we can now find out what faults your car has even if they are not obvious. This is thanks to built in processors, microchips and sensors. 

Diagnostic tests can reveal problems with a car's engine, transmission, exhaust, brakes, and many other major components. It can also reveal problems in the performance and fuel delivery. 

Diagnostic testing saves time and money at the mechanics with fault-finding and getting to the root of a problem. It can also reveal a problem before it's obvious meaning you can fix it early.