U11E9 on Chrysler
Lost Communication With Active Grille Shutter Module
U11E9 on Chrysler vehicles indicates lost communication with active grille shutter module. Au7o has documented this code across 1 Chrysler model — most commonly on Voyager. U11E9 is a manufacturer-specific network communication code used mainly by Chrysler, Dodge, Jeep, and RAM vehicles. It means a control module (typically the PCM) has lost communication over the data bus with the active grille shutter system, which opens and closes vanes behind the grille to manage airflow for aerodynamics, fuel economy, and engine warm-up. The computer detected that expected messages from the shutter actuator are missing or corrupted. It usually only triggers a check engine light and a small efficiency/cooling impact rather than a driveability emergency. Typical repair costs on Chrysler range from $350 to $700, depending on the specific model and root cause.
Common Causes of U11E9
- •Faulty active grille shutter actuator/motor
- •Damaged or corroded wiring or connector at the shutter module
- •Open or short in the data bus (CAN) circuit
- •Loss of power or ground to the shutter module
- •Debris, ice, or physical obstruction jamming the shutter
- •Software/PCM update needed
U11E9 on Chrysler by Model
Chrysler Voyager(1 issue)
- Active Grille Shutter Module Failure — Check Engine Light With Lost Communication (U11E9)2020-2022
The active grille shutter (AGS) is a motorized vane assembly behind the lower grille that the PCM closes for warm-up and aerodynamics and opens for cooling airflow. On these minivans the integrated AGS actuator/module fails or drops off the vehicle network, setting U11E9 (PCM lost communication with the active grille shutter module) and illuminating the MIL. Chrysler issued dealer bulletin 9004138 (June 30, 2021) and revision 9004138A (July 21, 2021) covering AGS diagnosis and replacement with preliminary checks, and both are listed against the 2020 and 2021 Chrysler Voyager; a further bulletin, S2008000132 and its revisions, covers MIL illumination with AGS communication loss combined with ambient air temperature sensor codes. The vanes can also bind mechanically from road debris, ice, or a minor front-end impact. A shutter stuck closed restricts radiator airflow — most noticeable as weak A/C performance in traffic and rising coolant temperature when towing or idling in heat — while a shutter stuck open costs warm-up time and fuel economy. Diagnosis is muddied by the fact that the module, the wiring and the mechanical vanes all produce the same code, which is why the bulletin guidance exists to stop parts being replaced before the preliminary checks are done.
Looking for U11E9 on a different make?
View U11E9 across all makes →Frequently Asked Questions
What does U11E9 mean on Chrysler?▼
U11E9 stands for "Lost Communication With Active Grille Shutter Module." U11E9 is a manufacturer-specific network communication code used mainly by Chrysler, Dodge, Jeep, and RAM vehicles. It means a control module (typically the PCM) has lost communication over the data bus with the active grille shutter system, which opens and closes vanes behind the grille to manage airflow for aerodynamics, fuel economy, and engine warm-up. The computer detected that expected messages from the shutter actuator are missing or corrupted. It usually only triggers a check engine light and a small efficiency/cooling impact rather than a driveability emergency. On Chrysler specifically, this code is documented across 1 model.
What causes U11E9 on Chrysler vehicles?▼
Common causes on Chrysler: Faulty active grille shutter actuator/motor, Damaged or corroded wiring or connector at the shutter module, Open or short in the data bus (CAN) circuit, Loss of power or ground to the shutter module, Debris, ice, or physical obstruction jamming the shutter. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U11E9 on a Chrysler?▼
Repair costs on Chrysler range from $350 to $700, depending on the specific model and root cause.
Which Chrysler models have U11E9 documented?▼
Au7o has documented U11E9 on 1 Chrysler model: Voyager.