What does immobilizer on Volvo 850 do?

The immobilizer on a Volvo 850 is a security feature designed to prevent unauthorized starting of the vehicle. It works by disabling the engine's ignition or fuel system unless the correct key or key fob, which contains a unique electronic code, is used. If an incorrect key is detected, the immobilizer prevents the engine from starting, thereby reducing the risk of theft. This system enhances the overall security of the vehicle.