Diagnostic Trouble Code (DTC) P2583-54 stands for "Millimeter Wave Radar Aiming Incomplete". On a 2017–2022 Honda CR-V, this code indicates that the vehicle's forward-facing radar sensor (located in the front grille or under the front emblem) has lost its calibration data or a calibration attempt was initiated but not completed.
When this code triggers, your Honda Sensing features—including Adaptive Cruise Control (ACC), Lane Keeping Assist (LKAS), and Collision Mitigation Braking System (CMBS)—will shut down completely, and multiple error lights will flash on your dashboard