1. A vehicle comprising: a vehicle body; and an active air dam assembly coupled to the vehicle body and configured to control an ambient airflow between the vehicle body and a road surface, the active air dam assembly including: an adjustable flap; a flap actuator configured to move the adjustable flap via the shaft anywhere between and inclusive of a stowed position having a first height relative to the road surface and a deployed position having a second height relative to the road surface, wherein the first height is greater than the second height; a plurality of sensors, each of which is operable for measuring a separate performance parameter of the flap actuator; and a controller configured to receive the measured performance parameters from the plurality of sensors, identify a fault mode of the active air dam assembly from among a plurality of different possible fault modes using the received performance parameters, and execute a control action corresponding to the identified fault mode.