RAM · 2025-08-22
Active Air Dam Diagnostic Trouble Codes (DTC) U0645, C0604.
U0645 · Manufacturer communications
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
U0645 ← What does this code mean?4 Results
RAM · 2022-09-22
Active Air Dam Not Functioning - X96 Warranty Extension This bulletin involves replacing the active front air dam. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find thatthe following Diagnostic Trouble Code (DTC) has been set: U0645 - Lost Communication With Active Air Dam Module. The customer may also comment on the following: The Active Air Dam is inoperable.
RAM · 2022-07-20
Active Air Dam Not Functioning - X96 Warranty Extension This bulletin involves replacing the active front air dam. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find thatthe following Diagnostic Trouble Code (DTC) has been set: U0645 - Lost Communication With Active Air Dam Module. The customer may also comment on the following: The Active Air Dam is inoperable.
FORD · 2022-05-02
Some 2021-2022 F-150 vehicles equipped with a 2.7L EcoBoost engine may experience a Check Charging System message displayed in the instrument panel cluster (IPC). The following diagnostic trouble codes (DTCs) may also be stored in the powertrain control module (PCM): U012D, U042E, U0284, U0285, and/or U0645. This may be due to local interconnect network (LIN) circuit VE181 (WH-GN), near connector C102A, being shorted to ground near the left engine mount bracket. If this wire is found to be shorted, repair as need per Wiring Diagram, Cell 005 and secure the harness assembly away from the engine mount bracket to prevent a recurrence.