What steps should I follow to start diagnosing this DTC code?

First, connect GDS (Global Diagnostic System) to the vehicle and select DTC Analysis mode. Check the DTC Status button to verify the DTC's information and confirm that the DTC Readiness Flag indicates COMPLETED. Record all DTCs, DTC status, and freeze frame data, and check whether the DTC Status shows Present (currently occurring) or History (previously occurred but cleared).