NASA flight controllers halted the first launch attempt after they were unable to verify that one of the SLS rocket's four main engines—engine no. 3—had been properly cooled to a temperature ...

After two failed attempts to launch, NASA's moon rocket may need repairs For a second time, ... a separate thing, a faulty engine temperature sensor. And, you know, they tried again to launch.

On Thursday, SLS engineers said that all four of the rocket's main engines were good and that a faulty temperature sensor caused engine 3 to appear as though it were too warm.

NASA delayed the launch of its SLS rocket amid an issue with one of the engines. The next available launch date is September 2nd.