What Causes No Clicking Sound and Failure to Start When Turning the Key?

[StAlexandra]

The reasons for no clicking sound and failure to start when turning the key are: 1. The steering wheel is locked: If the steering wheel wasn't straightened after turning off the engine, the vehicle may enter sleep mode and lock the steering wheel, preventing the key from turning and causing startup failure. Try turning the steering wheel while turning the key to unlock it. 2. Insufficient fuel: Due to abnormal fuel pump supply, check if the fuel gauge is in the red zone. The solution is to refuel. 3. Faulty fuel injector(s): This can cause weak engine startup or failure to start, with significant shaking at idle. It not only wastes fuel but may also affect engine lifespan. The solution is to inspect each fuel injector individually and replace if necessary. New fuel injectors require computer pairing after installation.