What Causes the Engine to Stall Immediately After Starting?

[Cheryl]

Possible reasons for the engine stalling immediately after starting are as follows: 1. The vehicle's anti-theft system is triggered, locking the engine, which allows the engine to start but not run, while the anti-theft light is on. This situation generally occurs in Volkswagen and Audi models, mostly because the owner, to prevent key loss, privately made a key without a chip or the key was dropped, weakening the signal, making the system unable to recognize it. Or it may be due to the replacement of the engine computer or anti-theft system components without proper matching, or damaged wiring. 2. Ignition switch failure, where the ignition line has power when starting, but power is cut off when the key is released, causing sudden stalling. This is usually caused by poor contact of the internal contacts of the ignition switch, often accompanied by the dashboard battery light, oil light, and engine fault light not turning on. Some may intermittently experience faults such as no air conditioning or heating, headlights not working, or electric windows malfunctioning before the fault occurs.