DTC B0021-13: Left Curtain Deployment Control 1 - Circuit open: Action
- Visually inspect the left side air curtain Ak2 connector, the locking plunger should be flush with the housing. If not, push the locking plunger in. Clear the DTCs and retest
- Refer to the appropriate system wiring diagrams and check the left side air curtain circuit for open circuit, high resistance