Automakers are undermining the progress they’re making in expanding the market for electric cars and other zero-emission vehicles by petitioning against California’s mandates, a state regulator said today.

The Alliance of Automobile Manufacturers and the Association of Global Automakers filed a petition with the U.S. Environmental Protection Agency last month to block California’s requirement that 1.4 million electric, plug-in hybrid, and fuel cell vehicles be sold by 2025.