For 1990-2009 cars

Checks | Action
--- | ---
Check the lock for damage. | Replace the lock cylinder.
Check the ignition switch for lack of free movement. | Lubricate the ignition switch.
Check for extreme misalignment of the housing to the cover. | Realign the cover on the housing. Replace the cover as needed.
Check for a bent ignition switch mounting bracket. | Replace the ignition switch mounting bracket.