Good news.
Most likely will be vacuum leaks letting unmetered air into the intake resulting in sensors picking up conflicting data.
A manifold or exhaust leak before the post cat sensor on 06/07 VZ or before the pre cat sensor on 04/05 VZ can also be an issue. Again, a smoke test will identify this. For exhaust leaks, the smoke would be fed into the exhaust pipe. For manifold leaks, it’s fed into the intake. Both should be done with low pressure.
Use a torch or laser pointer to find smoke coming out in the engine bay etc. sometimes it’s hard to see.