1. Starter Motor: The starter motor is responsible for engaging the engine and turning it over. If the starter motor is damaged, it can make a screeching noise when you turn the key.
2. Serpentine Belt: The serpentine belt drives various accessories in the engine, such as the alternator, power steering pump, and air conditioning compressor. If the belt is loose or damaged, it can slip and make a screeching noise.
3. Alternator: The alternator generates electricity for the car's electrical systems. If the alternator is malfunctioning, it can produce a screeching noise.
4. Power Steering Pump: The power steering pump provides hydraulic pressure for the power steering system. If the pump is failing or has low fluid, it can make a screeching noise.
5. Air Conditioning Compressor: The air conditioning compressor pressurizes refrigerant for the air conditioning system. If the compressor is failing or has low refrigerant, it can make a screeching noise.
6. Other Components: In some cases, the screeching noise may be coming from other components in the engine, such as a worn-out bearing or a loose pulley.
If you hear a loud screeching noise when you turn the key to start your car, it is important to have it diagnosed by a qualified mechanic as soon as possible to identify the source of the problem and prevent further damage.
