The turn signal switch is loose.

Tighten the turn signal switch to the correct torque. Refer to Fastener Tightening Specifications .

Other components interfere with the operation.

Reposition the components.

Foreign material is present.

Remove the foreign material.

The turn signal switch is broken or damaged.

Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle .