- Idle air control (IAC) valve is faulty. The IAC valve controls the amount of air that flows into the engine when it's idling. If the IAC valve is faulty, it may not be able to provide enough air to the engine, causing it to stall.
- Throttle body is dirty. The throttle body is responsible for controlling the amount of air that flows into the engine. If the throttle body is dirty, it can restrict the airflow and cause the engine to stall.
- Fuel injector is clogged. Fuel injectors deliver fuel to the engine's cylinders. If a fuel injector is clogged, it may not be able to deliver enough fuel to the engine, causing it to stall.
- Fuel pressure is too low. The fuel pressure regulator ensures that the fuel pressure is within a specific range. If the fuel pressure regulator is faulty, it may not be able to maintain the proper fuel pressure, causing the engine to stall.
- Vacuum leak. A vacuum leak can draw unmetered air into the engine, disrupting the air-fuel mixture. This can cause the engine to run lean and stall.
- Crankshaft position sensor (CKP) is faulty. The CKP sensor provides the engine's computer with information about the position of the crankshaft. If the CKP sensor is faulty, the computer may not be able to properly control the engine, causing it to stall.
- Battery is weak or damaged. If the battery is weak or damaged, it may not be able to provide enough power to start the car or keep it running.
- Alternator is faulty. The alternator generates electricity to power the car's electrical systems and recharge the battery. If the alternator is faulty, it may not be able to generate enough electricity, causing the car to stall.
To determine the exact cause of the problem, it is recommended that you take your car to a qualified mechanic for a professional diagnosis.
