Actually i go an error ORA-600 [kkoipt:incorrect pwj] on 11.2 an i applied the patch 9929660.
But the error occured on a instance again. So i was wondering how i can check if the online patch is activated.
opatch lsinventory just shows if the patch is installed on the oracle home.
The solution was:
oradebug patch list
Here you see if the patch is activated on the instance. Aswell you could disable the patch for the instance.