The C4s did not have as many requirements for OBD-II monitors to be running tests.
OBD-II regulations were beefed up even more in 1999 and thus a 1996 C4 would not have the same issues as testing in an incomplete state.
The only way to really know the state of all these test monitors is to be using a OBD-II scanner able to view these tests and report what state they are in.