on her right hand and superficial burns on her left hand in a crash during practice for the 2011 Indianapolis 500 on 19 May. The crash, which sent her car sailing into the catch fence before flipping and landing on its left tires, was caused by a mechanical failure in the left rear of her No. 78 Dallara-Honda. On 21 May, using her backup car, she qualified 24th for the race with a four-lap average of 224.392 mph. After a crash at the Milwaukee Mile during qualifying, de Silvestro was cleared to drive in the race, but withdrew after experiencing dizziness and impaired vision. At the next race, in Iowa, she was not cleared to compete, due to continuing dizziness. De Silvestro missed round 13 of the season at Sonoma, after being refused entry to the United States. De Silvestro said she did not know why she was turned away. She finished 20th overall in the 2011 series standings. De Silvestro returned to HVM Racing for the 2012 IndyCar Series season, piloting the No. 78 Nuclear Clean Air Energy sponsored Dallara-Lotus. The entry was one of five cars to start the season powered by the new Lotus engine. The Lotus proved to be significantly underpowered compared to the Chevrolet and Honda engines used by the rest of the field. By the end of May, all entrants other than de Silvestro's No. 78 had abandoned the Lotus powerplant and switched to either Chevy or Honda. De Silvestro was saddled for the entire season with the inferior Lotus. The underpowered engine made it impossible for de Silvestro to be competitive, resulting in consistently poor qualifying and race results. On several occasions the car was black flagged for failing to maintain the minimum safe speed, including the 2012 Indianapolis 500. For the season, de Silvestro qualified for all 15 races on the schedule, started 14, and finished 6. Her best finish was 14th at Detroit and Iowa. She finished 24th overall in the series standings. On 30 October 2012, de Silvestro signed on with KV Racing Technology for the 2013 IndyCar Series season, driving the No. 78 Dallara-Chevrolet with sponsorship from Nuclear Clean Air Energy. De Silvestro joined veteran driver Tony Kanaan to make KV Racing Technology a two-car team for the 2013 season. On 5 October 2013 at the Grand Prix of Houston, de Silvestro finished second in the first race for