It was a milestone trip to victory lane, too.
His 40th career win broke a tie with Al Unser for fifth on the series' all-time list.
The Australian, who started second, desperately needed this one.
Last weekend at Nashville, Power finished 14th, squeezing one teammate, Simon Pagenaud, into a wall early in the race and later colliding with another teammate, Kiwi Scott McLaughlin.
"Certainly, the incident with McLaughlin was not good," Power said. "I didn't see Roger [Penske] after the race. I thought, 'I need to win a race before I speak to him again'. Fortunately, I did that."
Alex Palou looked like he was going to pad his points lead when he was running fourth with 17 laps to go — well ahead of Dixon, who sat second in the series standings. Then, suddenly, a puff of smoke appeared from the back of the No 10 Honda and the powerless car rolled to a stop.
"It's a shame when you're running so good," Palou said.
With Palou finishing 27th in the 28-car field, everybody else made up ground. Pato O'Ward, who finished fifth, passed Dixon for second in the standings, 21 points behind. Dixon, who started with a 42-point deficit, now trails by 34 in third, and two-time series champ Josef Newgarden remained fourth, 55 points behind.
- AP