Check engine light on - diagnostics says its air metering system, what is this? on 2001 Jaguar XKR

Check engine light came on last week. Took to put on diagnostic machine and was told it was the air metering system. What is this and estimate of cost to repair

Asked by for the 2001 Jaguar XKR
before pricing. you need to tell us what the results of the diag was. It could be wiring, air cleaner snorkel hose, mass air flow sensor or some other items.
need more info on the results of your diag.