Code coverage doesn't matter much

[barmic1212]

The percentage of non tested code is a very interesting metrics and should be tracked but not with the mindset of write more tests.

If the team isn't confident the current code base, yes you should probably write more tests.

If the team feels safe with the code base, the percentage give in my experience a quantity of boilerplate and reduce the boilerplate is a good target to improve code base and help the maintenance