The lock bolt spring is broken.

Replace the spring. Refer to Steering Column Tilt Head Housing - Assemble - Off Vehicle

The sector tooth is damaged.

Replace the lock module assembly.

Refer to Electronic Column Lock Module - Disassemble - Off Vehicle .

The lock cylinder is faulty.

Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement - On Vehicle

The housing is damaged.

Replace the lock module assembly.

Refer to Electronic Column Lock Module - Disassemble - Off Vehicle .

The ignition switch is stuck.

Replace the ignition and key alarm switch assembly.

Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle .