DTC B0021-2B: Left Curtain Deployment Control 1 - Signal cross coupled: Action

NOTE: The airbag connector has a locking plunger (orange tab) which should only fully lock when the two connectors are securely mated, male to female. If the plunger can move to the locked position easily when not mated (ie: using reasonable pressure), then this indicates that the connector is damaged. Install a new wiring harness as necessary.

Refer to the appropriate system wiring diagrams and check the left side air curtain circuit for short circuit to another restraints circuit