What is the purpose of the plastic lower engine cover in a Honda Fit? Mine broke off in a minor accident.the car is now making creaking noises when I drive and the indicator lights keep going on and off, is it related? Safe to drive? Car is running well
The lower plastic covers are for aerodynamics. They aren't really needed for function, so aren't a safety item. You should be able to drive them just fine without them.
That said, if you are hearing creaking, it wouldn't be because you are missing these covers. There is something else going on which might make your car unsafe to drive. I'd have it professionally looked at, for peace of mind, if nothing else.
An under engine cover also protects engine sensors and the wiring loom from water and debris off the road. It can also help route airflow created by the radiator fan.
The creaking & indicator problem might be related to a cable being stressed during the incident or another part being loose as others have said.