DETROIT — Ford Motor has lowered fuel economy ratings for six of its vehicles, mostly hybrids, and will reimburse about 215,000 customers after the automaker applied test data incorrectly.

This is the second time in the past year Ford has had to lower mileage figures on some models, a setback to its reputation as a leader in fuel economy.

Affected are most 2014 Ford Fiestas as well as 2013-14 hybrid models of the Fusion, Lincoln MKZ and C-Max, and plug-in hybrids Fusion and C-Max Energi. Most see a drop of 1 to 5 miles per gallon. The larger and heavier MKZ has the biggest drop: from 45 to 38 mpg in combined city and highway driving.

The Environmental Protection Agency has given Ford 15 days to correct its labels. Ford has told dealers that new fuel economy labels will be available in about six days and that dealers may continue selling the vehicles until the new labels are received.

About 200,000 customers are in the U.S. with 13,000 in Canada and 2,000 in markets where vehicles use U.S. testing results, Raj Nair, Ford head of global product development, said.

They will receive “goodwill payments” ranging from $125 to $1,050 for the estimated cost of the difference between the previous and revised fuel economy labels. The amount varied by vehicle, miles driven and whether it was bought or leased.