The FIA has concluded its inquiry into the Bahrain Grand Prix formation-lap problems at the Sepang International Circuit, identifying a software bug that triggered widespread power loss in heavy rain.

Several cars struggled to maintain low-speed deployment, with some stopping. The start slipped by roughly 40 minutes as rain intensified. Drivers reported intermittent power at throttle tip-in.

The FIA review targeted four areas: the root cause, prevention, improved wet-weather settings, and cross-checking data from teams and manufacturers, including the standardized ECU supplier.

Analysis showed a software fault limiting energy management at very low speeds in wet conditions. The software bug constrained deployment, undermining drivability across multiple power units.

To stabilise risk, Singapore will run the same configuration used in Malaysia. The approach prioritises predictable mapping over experimental wet settings for the immediate term.

Further updates are scheduled for Austin, targeting wet-weather robustness and correlation. Test benches and prior events, including Belgium and the Netherlands, failed to replicate Sepang’s exact profile.

Validation will now expand, with independent audits and wider scenario libraries. The FIA will coordinate results with teams and power unit manufacturers to strengthen sign-off.

Single-seater director Nikolas Tombazis said Malaysia’s circumstances exposed test gaps. He committed to tighter processes to avoid repeat disruption during formation laps.

Teams are revisiting procedures for low-speed torque control, regen limits, and pitwall guidance. The aim is consistent behaviour in out-of-window conditions without sacrificing performance.

That push aligns with feedback from senior figures, including Helmut Marko’s comments on software failure after Sepang. Reducing edge-case exposure should limit cascading start-sequence complications.

The Sepang weekend also prompted start-position changes, underlining how small technical variances can escalate operationally. Clearer mapping should reduce such knock-ons.

With processes tightened, fans should see cleaner getaways. The 2026 season can progress with fewer formation-lap risks as teams and the FIA implement these measures.

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Daniel Miller

Daniel Miller reports on Formula 1 Grand Prix weekends with race-day analysis, team-radio highlights, and point-standings updates. He explains power-unit upgrades, aerodynamic developments, and driver rivalries in straightforward, SEO-friendly language for a global F1 audience.