Diagnostic fault observation

The so-called obd2 code reader observation is the auto mechanic carefully observed the car users pointed out the location of fault fault phenomena, and then judge the fault, which is an application up to the most basic and most effective method of fault diagnosis. Such as hair dryer exhaust pipe to take the blue smoke of failure, to judge the phenomenon can take the blue smoke, such as in the course of long-term risk Lanyan really long mileage engines use generally can be judged as a cylinder or piston ring wear , resulting with the gap is too large obd2 scan tool, due to the oil pan of oil fleeing into the combustion chamber through the clearance between the piston ring and cylinder wall; future risk Lanyan if only emits blue smoke when the engine just a launch gradually become more mild and generally can be to judge the rod block oil engine valve cover aging or bore wear to block oil disabled, but a small amount of oil leaking into the cylinder along the valve stem caused obd2 scanner.

The experience can accurately judge, the inexperienced should further observation. In the observation process, but also with the experience and theory, make careful thinking and push the card can not be simply sloppy, can not be fooled by appearances. Some phenomenon for those with experience is not suddenly be able to see clearly, then they would have to look at a few times, careful observation, to the outside to the inside, to see through obd2 bluetooth the fault phenomenon.