Fuel System Issues:
* Fuel pump failure: The pump might not be delivering fuel to the engine.
* Clogged fuel filter: A blocked filter prevents fuel from reaching the engine.
* Fuel pressure regulator malfunction: This regulates fuel pressure, and a failure can lead to insufficient fuel delivery.
* Empty fuel tank: Obvious, but sometimes overlooked!
* Bad fuel injectors: These spray fuel into the engine; a faulty injector can cause misfires or a complete shutdown.
Ignition System Problems:
* Faulty ignition coil: This supplies high voltage to the spark plugs. A failure can cause misfires or complete engine shutdown.
* Spark plug problems: Worn, fouled, or damaged spark plugs prevent proper ignition.
* Crankshaft position sensor failure: This sensor tells the computer the engine's rotational position; a faulty sensor can cause the engine to stall.
* Cam position sensor failure: Similar to the crankshaft sensor, but for the camshaft.
* Ignition switch malfunction: A rare but possible cause.
Electrical System Issues:
* Alternator failure: This recharges the battery while the engine runs; failure leads to battery drain and engine shutdown.
* Battery failure: A dead or failing battery can prevent the engine from starting or running.
* Loose or corroded battery terminals: Poor connections can prevent sufficient current flow.
* Faulty computer/ECU (Engine Control Unit): The car's computer controls many aspects of the engine; a malfunction can cause various problems, including shutdown.
* Wiring harness issues: Damaged or corroded wiring can disrupt electrical signals.
Other Potential Causes:
* Overheating: The engine could shut down as a safety measure to prevent damage.
* Transmission problems: In some cases, transmission issues can cause the engine to stall.
* Vacuum leak: A large leak can disrupt engine operation.
* Throttle body issues: Problems with the throttle body can affect air intake and lead to stalling.
This is not an exhaustive list, and diagnosing the exact cause requires a professional inspection. Don't attempt to drive the car until it's been checked, as some of these issues could be dangerous.
