Immobilizer Active Vw Passat

The message on a VW Passat is a security alert indicating that the vehicle's anti-theft system cannot verify the identity of the key used, preventing the engine from running. While the car may fire up for about one second, the Engine Control Unit (ECU) will immediately cut fuel and ignition if it doesn't receive a matching signal from the transponder. Core Function & Behavior

It is rare, but keys can "lose" their programming. immobilizer active vw passat