U11E9: Lost Communication With Active Grille Shutter Module
2 vehicles · 1 makes · $200-$12,000 repair
Most Reported On
U11E9 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2022-2024 Jeep Grand Wagoneer, and 2022-2025 Jeep Grand Cherokee (4xe, Trailhawk 4xe, Overland 4xe, Summit 4xe, Anniversary Edition 4xe), with repair costs ranging from $200 to $12,000.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose U11E9, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (2)
FAQ
What does U11E9 mean?
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.
What are the most common causes of U11E9?
The most common causes of U11E9 are: 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. The specific cause varies by vehicle.
How much does it cost to fix U11E9?
Repair costs for U11E9 range from $200 to $12,000, depending on the vehicle and root cause.
Which vehicles are affected by U11E9?
Au7o has documented U11E9 across 2 vehicle models from 1 manufacturers: Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.