Sepang patch returns if Singapore is wet; Austin gets update
Formula 1 has a clear plan for wet-weather power-unit software after the formation-lap failures that disrupted the Bahrain Grand Prix, which was staged at Malaysia’s Sepang International Circuit.
The FIA has completed its formal review and confirmed a two-stage response. The emergency configuration released during the Sepang delay will return for the Singapore Grand Prix if similar weather is expected,
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and a further wet-weather update is due for the United States Grand Prix on 25 October.
What Happened at Sepang
The problem surfaced when several cars lost drive during the formation laps at Sepang.
Race control suspended the start procedure at 15:45 local time, after two formation laps, while the cause was investigated. The delay was visible to fans worldwide.
According to the FIA, its technical team identified the cause within five minutes and issued updated software configurations designed to address the fault.
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Teams installed the revised package, and the race was able to start.
What the FIA Review Found
The review traced the fault to cars running at low engine revolutions in certain sectors where a 250 kW power reduction was applied under wet-weather energy limits.
In those zones, the FIA found, some cars suffered a “loss of power beyond the original intent” and could not recover it while they remained in the restricted area.
In practical terms, a car caught in the wrong place at the wrong engine speed was left without the drive needed to move away.
The FIA’s public statement stops short of a full technical breakdown, but the findings indicate the restriction interacted badly with low engine speeds.
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The emergency configuration was designed to address that problem and allowed the race to proceed.
Was the Software Tested?
The FIA rejected suggestions that the software had gone untested. It said teams and manufacturers ran simulations before implementation,
and that the package was then run in full-scale form during first practice at both the Belgian and Dutch Grands Prix.
Even so, FIA single-seater director Nikolas Tombazis acknowledged that testing had not been as extensive as the governing body would have liked, because there has been very little wet running this season.
Singapore: The Immediate Test
Singapore now offers the first immediate test. Thunderstorms are forecast for Sunday at Marina Bay, so the Sepang configuration could be needed this weekend.
Because it has already been used in a race start, teams will approach the weekend with a known package rather than an untried interim measure,
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which should limit operational risk and keep attention on strategy and tyre management.
Austin: The Longer-Term Fix
The Austin update is intended as the longer-term answer. The FIA has said it will continue working with teams,
power-unit manufacturers and the supplier of the standardised electronic control unit to strengthen software testing and verification.
That includes independent assessment and collaborative feedback, while recognising that opportunities to test wet-weather software in representative conditions are limited.
Why Software Matters Under the 2026 Rules
The episode highlights how much responsibility the 2026 regulations place on software.
With electrical power now a far larger share of total output, the energy-management code that governs deployment has become as critical to performance and safety as any mechanical component.
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Because the FIA issued the correction to every team and manufacturer, the fix applied equally across the grid, protecting competitive fairness.
There is also a reputational dimension. A delayed start in front of a global audience is the kind of visible disruption a technology-led championship wants to avoid, particularly in a season when the new rules are under close scrutiny.
The speed of the response, with a cause identified inside five minutes and a patch delivered during the delay, shows that governance can move quickly when needed.
The longer-term test is whether the strengthened validation process closes the gap before another unusual weather pattern exposes a new edge case.
What Teams and Fans Should Watch
For teams, the practical message is continuity. If rain arrives in Singapore, every car will run the same validated map, and a revised package is scheduled to follow in Austin.
Engineers will still want to watch how cars behave at low speed in restricted zones, but the competitive focus should return to set-up, strategy and driver skill rather than the integrity of the control code.
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Marina Bay’s tropical climate and the possibility of Sunday thunderstorms make Singapore a realistic proving ground.
Watch for how cars behave on formation laps, in standing-start procedures and through slow corners if the track is wet.
Any hesitation in those phases would be an early signal that further refinement is needed before Austin.
Conclusion
In short, the FIA has turned a highly visible disruption into a structured programme:
a proven emergency configuration for Singapore, a refined update for Austin and a commitment to stronger testing.
The regulator has been open about the limits of wet-weather testing, and that candour matters.
For a sport asking its fans and teams to trust a new generation of hybrid power units, transparent engineering follow-through is as important as the fix itself.
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Singapore and Austin will now show whether the solution really holds up.
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