Sussan Ley has struck a conciliatory tone with climate rebels in her partyroom, suggesting a shift from the party's long-held net zero position could be on the cards.

Liberal infighting over climate policy has reignited this week as frontbencher Andrew Hastie vowed to move to the backbench if the coalition held firm to the bipartisan position of net zero emissions by 2050.

As the party reviews the policy, the federal Liberal leader said she held misgivings with the position over cost.

"We will not have net zero at any cost because the cost can be too high," Ms Ley said on Wednesday.

"And right now, it looks like the cost is too high when you consider what this government is about to do with its Paris targets."

The federal government is expected to reveal its 2035 target on the road to

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