Possible Causes

WARNING: This page is about a different car, the 2015 Land Rover LR2, 2014 Land Rover LR2, and 2013 Land Rover LR2. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Circuit references G_G_IATS AMS

The engine control module measured a signal voltage below a specified range but not necessarily a short circuit to ground, gain low
Mass air flow sensor connector is not correctly latched
Power feed to mass air flow sensor, open circuit
Mass air flow sensor circuit, short circuit to ground, short circuit to power, open circuit, high resistance
Mass air flow sensor failure