What Causes a Car to Fail to Start and Make a Buzzing Sound?

[CamilaAnn]

Car failing to start accompanied by abnormal noises can be attributed to the following reasons: Low car battery voltage: Improper daily usage can lead to battery discharge. Typically, a battery's lifespan ranges from 3 to 5 years. If it exceeds this period, timely replacement is necessary. Insufficient fuel supply in the fuel system: Failure to meet the required air-fuel mixture ratio for the engine. Check if the fuel level is adequate. Excessive carbon buildup: Excessive carbon deposits in the intake pipe, throttle body, and idle speed motor prevent the engine from achieving the required air-fuel mixture ratio. Idle driving and poor driving conditions accelerate carbon formation. Starter motor malfunction: Faults in the starter motor or related circuits prevent the magnetic coil from maintaining engagement, failing to provide the necessary torque for starting. Ignition system failure: Ignition system issues prevent the engine from starting, with the ignition key remaining in the start position, causing the starter relay to repeatedly engage and produce abnormal noises.