The McLaren drivers and Mark Webber escaped with mere reprimands on Sunday after being investigated by the stewards.
The stewards, including former F1 driver Mark Blundell, looked into whether the trio went too quickly for the yellow flag triggered by Heikki Kovalainen's crash.
McLaren boss Martin Whitmarsh welcomed the "sensible" reprimand, rather than an actual penalty, because he insists his drivers were "off the throttle" in the yellow flag zone.
Steward Blundell, however, said on BBC terlvision that the drivers were reprimanded because their "personal sectors improved" within the yellow zone.
Meanwhile, HRT team boss Colin Kolles said after Sunday's race that he is not protesting the outcome of the Spanish Grand Prix.
But because he is so unhappy with teams running what he calls "illegal" blown exhaust configurations, he vowed to protest at "some time" during the Monaco round next weekend.