U11E9 on Jeep
Lost Communication With Active Grille Shutter Module
U11E9 on Jeep vehicles indicates lost communication with active grille shutter module. Au7o has documented this code across 2 Jeep models — most commonly on Grand Cherokee, Grand Wagoneer. 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 Jeep range from $200 to $12,000, 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 Jeep by Model
Jeep Grand Cherokee(1 issue)
- 4xe High-Voltage Battery/Charging System Faults Triggering No-Start or Reduced Propulsion2022-2025
Grand Cherokee 4xe models have generated substantial owner complaints for hybrid system warnings, charging faults, propulsion loss, and no-start conditions tied to the high-voltage battery pack, battery coolant heater, or related control logic. Several recalls and service actions have addressed fire risk, battery pack concerns, and software behavior in 4xe vehicles. Owners commonly describe a check engine light with 'service charging system' or 'service hybrid electric vehicle system' messages, sometimes leaving the vehicle unable to charge or drive normally.
Jeep Grand Wagoneer(1 issue)
- Battery drain / no-start due to telematics or module staying awake (parasitic draw)2022-2024
Owner reports and NHTSA complaints describe repeated dead 12V batteries and no-start conditions on Grand Wagoneer, often after sitting overnight or a few days. The pattern is consistent with parasitic draw from modules not going to sleep (commonly telematics/infotainment-related controllers), leading to low voltage and cascading network faults.
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View U11E9 across all makes →Frequently Asked Questions
What does U11E9 mean on Jeep?▼
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 Jeep specifically, this code is documented across 2 models.
What causes U11E9 on Jeep vehicles?▼
Common causes on Jeep: 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 Jeep?▼
Repair costs on Jeep range from $200 to $12,000, depending on the specific model and root cause.
Which Jeep models have U11E9 documented?▼
Au7o has documented U11E9 on 2 Jeep models: Grand Cherokee, Grand Wagoneer.