• The buzzing sound when a car starts is usually caused by a faulty starter solenoid or relay switch. When either of these components fails, it can cause the starter motor to continue running after the engine starts. This can result in a loud buzzing noise.
•In some cases, a defective ignition switch or faulty wiring can also cause a car to make a buzzing noise when starting.
•It's important to promptly investigate the source of the buzzing noise to prevent further damage to your car's electrical system.
How to Stop the Buzzing if it Won't Go Off
If the buzzing noise persists even after the car has started, follow these steps to stop the buzzing.
1. Turn the key to the off position. This should stop the starter motor from running and silence the buzzing noise.
2. Press the clutch pedal to the floor (manual transmission vehicles only). This will disengage the starter motor from the flywheel, preventing it from rotating.
3. Try starting the car again. If the buzzing noise has stopped, it means the starter solenoid or relay switch was faulty and required replacement.
4. If the buzzing noise persists, repeat step 1. This time, however, do not press the clutch pedal. This will allow the starter motor to engage the flywheel but will prevent the engine from starting.
5. Wait a few seconds and then turn the key to the off position. This should disengage the starter motor from the flywheel and silence the buzzing noise.
6. Take your car to a trusted mechanic for further diagnosis and repair. The mechanic will be able to identify the exact source of the buzzing noise and perform the necessary repairs.
