A method of providing a notification following a passive, keyless start of a vehicle when a keyfob for the vehicle is not within a passenger compartment of the vehicle. Where a motor is started using a passive keyless start (PKS) system having a keyfob transceiver within the keyfob and a vehicle transceiver (VT) within the vehicle, the absence of the keyfob may be determined by the failure to receive an accurate response signal from the keyfob transceiver following the transmission of a vehicle challenge signal from the vehicle transceiver. Upon this determination, a notification may be provided directly or indirectly to the vehicle user via a wireless carrier system.