Possible Causes

WARNING: This page is about a different car, the 2017 Jaguar XJ, 2016 Jaguar XJ, 2015 Jaguar XJ, 2014 Jaguar XJ, and 2013 Jaguar XJ. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Monitor description . Mass air flow sensors left/right flow to low
This DTC is set when the powertrain control module has measured a signal voltage below a specified range but not necessarily a short circuit to ground, gain too low.

Blocked air filter
Other related DTCs
Air induction system, incorrectly installed components, loose hose clips or air leakage
Mass air flow sensor contamination by oil or debris
Electric throttle blade contamination by oil or debris
Mass air flow sensor circuit, short circuit to ground, short circuit to power, open circuit, high resistance
Throttle adaption failure