U110E on Jeep: How to Diagnose & Fix
Lost Ambient Temperature Message
1 Jeep model · 1 documented issue
U110E on Jeep by model: symptoms, diagnosis and fix
The 8.4-inch Uconnect 4 and the newer Uconnect 5 head units frequently freeze, glitch, reboot multiple times before booting, or go to a black screen. A common and safety-relevant failure mode is the rear backup camera failing to display when shifted into Reverse, showing a blue/black screen, or staying on after moving forward. The system is sensitive to 12V voltage drops (a weak auxiliary/aux battery makes it lag, reset, or refuse to boot), and many JLs ship with loose fuses that aggravate the problem. For 2024 Wranglers with Uconnect 5, Stellantis has issued radio software update bulletins (e.g., TSB 08-203-24, an over-the-air update for the 12.3-inch display).
Common Symptoms
- Touchscreen freezes / unresponsive buttons
- Radio reboots 3-4 times
- Black or blank Uconnect screen
- Backup camera blue/black screen in Reverse
- Camera image lingers after moving forward
- CarPlay/Android Auto dropouts
How to Fix
Reboot the head unit (hold volume + tuner knobs ~10-20 seconds) and reseat fuse F97 to clear a frozen state. Have the dealer apply the latest Uconnect radio software update for your VIN, which addresses many freeze/reboot and camera bugs. Check and tighten loose cabin fuses and verify the auxiliary/12V battery health, since low voltage triggers resets. If the backup camera still blanks, inspect the camera, its harness, and connector; replace the camera or radio module if a hardware fault is confirmed.
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What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mopar 56029759AB auxiliary 12 V batteryOEMMopar 56029759AB
Do not assume fitment for eTorque or 4xe; en
- Mopar 68452959AC rear-view cameraOEMMopar 68452959AC
Replace a circuit-tested failed rear camera after software, power, connector and harness faults are excluded Fitment/availability: 2018-2024 Wrangler JL applications cataloged without the alternate 35-inch-tire or off-road-camera configu…
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Sources for this issue (2)
U110E code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U110E mean on a Jeep?
U110E stands for "Lost Ambient Temperature Message." A Chrysler/Dodge/Jeep/Ram network communication code. The ambient air temperature sensor is a direct input to the body control module, which then broadcasts the outside-temperature value over the CAN C bus to the PCM and other modules; this code sets when the receiving module stops getting that message. Typical symptoms are an outside temperature display stuck at -40 or dashes, no compass/temperature readout, and sometimes odd HVAC or automatic climate behavior. Engine performance is usually unaffected, and this is a message/communication fault rather than proof that any single sensor is bad. On Jeep it is documented across 1 model: Wrangler.
What are the most common causes of U110E?
The most common causes of U110E are: Failed or disconnected ambient air temperature sensor (usually behind the grille/bumper), Damaged or corroded wiring between the sensor and the body control module, CAN C bus wiring fault or a poor ground affecting bus communication, Failed body control module not broadcasting the message, Aftermarket accessory or module disturbing the CAN bus, Corroded module connectors from water intrusion. The specific cause varies by vehicle.
How much does it cost to fix U110E on a Jeep?
Repair costs vary widely with the root cause and Jeep model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.