How do you reset the Immobilizer light on Volvo V40?

To reset the Immobilizer light on a Volvo V40, first ensure that the vehicle is in a safe and off state. Insert the key into the ignition and turn it to the "On" position without starting the engine. Leave it in this position for about 10 minutes until the Immobilizer light turns off, then turn the key back to the "Off" position. Finally, start the engine to check if the light has reset; if the issue persists, consult a professional technician for further assistance.