On Saturday, a rocket called Terran, developed by Relativity Space, attempted its inaugural flight. The rocket was constructed almost entirely from 3D-printed components.
Despite the engines igniting, they immediately shut down, leaving the rocket grounded on its pad.
The launch controllers reset the countdown clocks and aimed for the final moment of the three-hour launch window at Cape Canaveral Space Force Station.
However, the onboard flight computers halted the countdown again with 45 seconds remaining.
Relativity Space attributed the first abort to automation software and the second to low fuel pressure.
Previously, the first launch attempt on Wednesday was terminated one minute into the countdown because of a malfunctioning valve.
There is no information on when Relativity Space plans to attempt another launch.
The rocket, standing at 110 feet (33 meters), is relatively small. Relativity Space reported that 85% of the rocket, including its engines, were produced using their enormous 3D printers at the company headquarters in Long Beach, California.