DTC B2795: Unmatched Ignition Key Code: DTC Detecting Condition
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
DTC B2795 is output when an unregistered key is inserted into ignition switch. When B2795 is output, delete DTC and insert ignition key that customer uses to see if it causes DTC B2795 to be output. When a key is found that causes B2795 to be output, register that key. When DTC B2795 is not output, there is a possibility the unregistered key has been inserted before. Ask the customer about the keys used to find cause of this problem.