What is the benefit of having a specialised diagnostic service carried out, compared to buying a cheap code reader for DIY diagnosis?
A. Cheap code readers can be useful for very basic problems, providing that the person using them knows how to interpret the results. Quite often they provide only generic codes, that must be translated to the fault relating to the particular car being diagnosed. Beyond this, these code readers usually cannot reset fault codes, nor can they read detailed information on when and how often a particular fault occurred. A specialised diagnosis provides highly detailed information on all faults, past and present, detected since the fault codes were last cleared, and can provide an action plan to resolve any faults or issues that exist. Additionally, old fault codes can be cleared, ensuring that the car is not storing information about faults that have been rectified. Modern cars have many electronic control units, each responsible for various functions within the car, such as the engine, gearbox, ABS, climate control, lighting, etc. These can all communicate over the diagnostics port, but i
