U0181 CADILLAC Lost Communication With Dynamic Headlamp Leveling Control Module

Possible causes – Faulty Dynamic Headlamp Leveling (DHL) Control Module– DHL Control Module harness is open or shorted– DHL Control Module circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) U0181 CADILLAC OBD Code Description Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data…