The lock bolt spring is broken.

Replace the spring.

The lock module gear train is jammed.

Replace the lock module. Refer to Electronic Column Lock Module - Disassemble - Off Vehicle or Electronic Column Lock Module - Assemble - Off Vehicle .

The lock cylinder is faulty.

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

The housing is damaged.

Replace the housing. Refer to Steering Column Replacement .

The ignition switch is stuck.

Replace the ignition switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle or Ignition and Key Alarm Switch Assembly - Assemble - Off Vehicle .