Chevrolet has been penalised 220 points for an engine regulation infraction following IndyCar's season opener in St Petersburg.
IndyCar said on Monday that 11 of the 12 Chevrolet-engined cars underwent repairs following the race.
Under rule 10.6.4.4 of the rulebook, 20 points will be deducted for every repair that requires a component change.
Chevrolet earned a total of 128 points in the opening race, but has been penalised 220.
The manufacturer dominated the season opener, with Chevrolet-powered cars occupying the top six positions.
Ryan Hunter-Reay was the first Honda driver in seventh place.
As a result of the penalties, Honda holds a 162-point advantage in the manufacturers' championship.