Why can't the lock cylinder of Nissan Tiida turn?

[DelBella]

When the steering wheel is locked and the key can't turn, many people might think there's a malfunction, but in fact, this is just the self-locking anti-theft feature of the car's steering column. The reasons why the key can't turn are as follows: Moving the steering wheel after removing the key: The cause of this situation is that the steering wheel was moved after the key was removed during the last engine shutdown. In this case, simply applying a little force while gently shaking the steering wheel left and right and turning the key can solve the problem. The principle of why it can't turn: After the key is removed, the mechanism controlled by the key no longer holds the locking pin, and the locking pin pops out under the action of the spring. At this point, if the steering wheel is turned, the locking pin will engage tightly with the locking groove on the steering column, making the key unable to turn as well.