The high-pitched electronic noise and the green LED that is not turning off after locking the car are both signs of a possible electrical problem. The noise could be coming from a number of different sources, such as the power window motor, the alarm system, or the central locking system. The green LED is typically controlled by the central locking system, so if the LED is not turning off, it is likely that there is a problem with the central locking system.
It is important to have the car checked by a qualified mechanic as soon as possible to determine the cause of the problem. If the problem is not addressed, it could lead to further damage to the electrical system of the car.
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