FIA Identifies Software Bug Behind Chaos at Malaysian Grand Prix

Formula 1 cars during the Malaysian Grand Prix at Sepang
Created9 Oct 2026
Reading time:1 min read
CategoryFormula 1
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The FIA has completed its investigation into the software problem that caused chaos before the start of the Bahrain Grand Prix, held at Malaysia’s Sepang circuit on October 4.

The investigation found that several cars suffered a greater-than-expected loss of power when running at low engine speeds under wet-weather settings that imposed a 250kW power reduction. The issue emerged during the formation laps on the wet track, forcing officials to suspend the start procedure.

According to the FIA’s timeline, the technical team identified the cause within five minutes of the start being suspended and quickly distributed an updated software configuration. Teams completed the installation before the race eventually got underway.

The FIA confirmed that the revised configuration used at Sepang will be reinstated for the Singapore Grand Prix if similar weather conditions are expected. A further wet-weather software update is planned ahead of the United States Grand Prix on October 25.

The governing body also announced plans to strengthen software testing and verification in cooperation with teams and power unit manufacturers. It stressed that the original software had undergone simulation exercises and track testing during practice sessions at the Belgian and Dutch Grands Prix.

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