What is the reason for the failure of Honda Accord vsa solenoid valve?

Honda Accord vsa solenoid valve failure has the following reasons: 1, difficult to start: Honda Accord is difficult to start, the idle speed is unstable, and the failure phenomenon is more serious when the car is cold. Most faults are caused by dirty throttle body or serious carbon deposition in idle speed control valve. The engine fault indicator light is always on sometimes. 2. Limited air intake: The main fault point is that the air intake is limited because the air intake is relatively large when the cold car is started. Although the computer will control the idle speed control valve to correct it, it needs a process. Therefore, this kind of fault often occurs because the throttle body is too dirty or the idle speed control valve has serious carbon deposition. However, this kind of fault rarely causes the fault light to stay on.