Barrichello said on Twitter that his morning's testing had been halted by a Kers problem - the second in as many days for Williams.
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Button's team-mate Rubens Barrichello said the decision to start the race at 1700 local time to suit European TV audiences was a major factor in the decision.
"Michael and I have had two, three or four situations of this kind, " said Barrichello.
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"It's been a hard weekend and I can't remember doing so few laps over a weekend, " said Barrichello.
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"I love these conditions and I'm really happy for those fans who stayed behind to see all this, " said Barrichello.
"Renault are the team who have made the biggest impression, " said Barrichello, following testing of the new Ferrari F2004 at Mugello in Italy this week.
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However, speaking later after a meeting with the team, Barrichello refused to back down and said they had apologised to him.
Brawn refused to criticise Barrichello for Sunday's outburst and said he sympathised with his driver's frustration.
Brawn said he would listen to Barrichello's interview again before deciding whether to take the matter further.
Barrichello's team boss Ross Brawn said the team are still investigating why the spring came loose from the back of their car.
"After so many years in Formula One, now my 17th, I've never got out of the car to go pee twice in the middle of qualifying, " Barrichello, on pole for the 14th time in his career, said of the day's several delays for rain.
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Speaking on the BBC's F1 forum after the race, Williams boss Frank Williams described Barrichello's outburst as "a bit of a red card job" but he said it would not be enough for him to sack a driver.
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