Some 2021 F-150 vehicles may exhibit a diagnostic trouble code (DTC) U0253:00 stored in the ABS module. To correct this condition, update the ABS module to the latest software level using the Ford Diagnostic and Repair System (FDRS). This DTC will not cause observable conditions or result from concerns with other vehicle systems. If any other ABS concerns are present, perform normal diagnostics. Refer to Workshop Manual (WSM), Section 206-09 > Anti-Lock Brake System > Diagnosis and Testing.