In many situations, the more common problems surface because we neglect or are unaware of proper care of our car. Electronic systems are one example, emissions are another. They can be a delicate pieces of equipment. Frequent or scheduled drivability diagnostics checks should be preformed.
One of the main areas this type off testing looks at is the power-train Control Module (PCM). It is the Engines control System, the on on board computer in every vehicle that acts as the brain of the engine. A PCM or circuit system failure can be the cause of many problems in your car including the transmission.