What causes a diesel engine to start and then stall after a while?

[VonLyla]

Low fuel system pressure such as low fuel pump pressure, fuel line leakage, insufficient power supply current, or damaged fuel pressure regulator, etc. Here is relevant information: 1. Anti-theft system: The triggered vehicle anti-theft system locks the engine, allowing it to start but not run. The engine stalls after releasing the key with a sputter or two, and the anti-theft light turns on. This situation commonly occurs in Volkswagen and Audi models, mostly due to the owner using a non-chip key (privately made to prevent key loss) or a key weakened by drops, making the signal too weak for the system to recognize. 2. Ignition switch failure: This is usually caused by poor internal contact of the ignition switch, often accompanied by the dashboard battery light, oil light, and engine fault light not illuminating. Some may experience intermittent failures like no air conditioning or heating, headlights not working, or power windows malfunctioning before the issue fully manifests.