So, we'll try and find something for sure, because we need to. But I don't have any great ideas at the moment," said Piastri.
Following Friday's initial practice failure, McLaren chief designer Rob Marshall confirmed that Norris' car suffered a sudden internal shutdown.
"We don't know conclusively yet. He had an electrical problem on the car and it shut down," said Marshall.
Engineers spent Friday evening reviewing telemetry data to isolate the root cause before the race commenced on Sunday.
"But we've not had enough time to go through the data and find out exactly what's gone wrong yet.
It could be anything, but it's electrical," said Marshall.
Marshall suspected that tire temperature irregularities in the opening sector contributed significantly to the lap time deficit.
"We're confident we can make it a bit better. I think we were struggling in the initial part of the lap.
And then as it went through sector two and three, we started to be a bit more competitive," said Marshall.
McLaren focused its efforts on stabilizing the car balance throughout the final sectors ahead of the competitive sessions.
"I think maybe that's tyre temperature or maybe something else.
But we've got a bit of stuff to work on, certainly, in the first half of the lap," said Marshall.
Speaking to select media including RacingNews365 after the race, Norris clarified that the ultimate failure occurred suddenly without providing any early cockpit alerts.
"Not a lot. At the end, it pretty much went immediately," said Norris.
The power unit concerns plagued the vehicle from the formation lap, escalating severely by the middle stages of the Grand Prix.
"There were some issues at the beginning, and then more in the middle, and I don't know if they're related or not.
We had to retire the car, so there's not a lot I can do nowadays," said Norris.
Norris detailed that multiple components within the hybrid system began making unusual noises before the pit wall ordered the retirement.
"Yeah, there was just a lot of stuff I could hear from the engine, the turbo, the battery — a lot of things that didn't sound correct," said Norris.
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McLaren will transport the damaged power unit back to its technical base for full forensic analysis ahead of the upcoming race weekend at the Circuit de Barcelona-Catalunya.
