U110E: How to Diagnose & Fix — Lost Ambient Temperature Message
2 vehicles · 2 makes · $700-$1,200 repair
How to diagnose and fix U110E: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Dodge Challenger · 2008–2014
The Totally Integrated Power Module (TIPM-7 generation) is the Challenger's central fuse-and-relay box and power-distribution computer, mounted in the engine bay. It manages nearly every electrical circuit, and a single failed solder joint, blown internal circuit-board trace, or — most commonly — a degraded internally-soldered fuel-pump relay can cripple the whole car. Because the fuel-pump (ASD) relay is hard-soldered into the TIPM circuit board (not a serviceable plug-in relay), owners cannot simply swap a relay. The dominant root cause is contamination/degradation of the sealed relay contacts (silicone vapor that hardens into insulation and burns under load) compounded by water/moisture intrusion and corrosion of the board, which is why failures are intermittent and often produce no stored trouble codes. The result is a cluster of seemingly unrelated, hard-to-diagnose faults: a relay stuck OFF causes random no-start, no fuel-pump prime, and mid-drive stalling; a relay stuck ON causes the fuel pump to run continuously and drain the battery overnight. This is the root cause behind the model's worst CarComplaints electrical category — the 2013 Challenger alone has a dedicated "bad TIPM" complaint cluster, with failures averaging around 43,000 miles (reported range roughly 8,000–76,000 miles), well within the life of the car. Critically for Challenger owners, the fuel-pump-relay recall campaigns (NHTSA 15V-115 / Safety Recall R09 and the 2019 redo 19V-813) covered the Durango and Jeep Grand Cherokee — NOT the Challenger. NHTSA's recall list for the Challenger shows only airbag and alternator campaigns, no TIPM recall, so Challenger owners pay out of pocket (commonly ~$700–$1,100). The 2008–2014 (LC-body) cars share the TIPM-7 implicated across the Chrysler/Dodge/Jeep lineup; 2010–2014 see the heaviest complaint volume.
Common Symptoms
- Engine cranks but will not start, intermittently or completely
- Fuel pump does not prime/buzz at key-on (no fuel pressure)
- Engine stalls or shuts off while driving with no warning
- Fuel pump runs continuously after shutdown, draining the battery
- Dead/drained battery overnight or after sitting a few days
- Random electrical gremlins: headlights, interior lights, wipers, or horn activating on their own
- Power windows or door locks operating by themselves
- Multiple simultaneous warning lights (check engine, ABS, traction control, airbag)
- Key fob not recognized / no-crank condition
- Transmission unresponsive or stuck in limp mode
- Dealer finds no stored trouble codes despite the symptoms (intermittent)
How to Fix
Diagnose first, because TIPM failures frequently store no codes and mimic a dead fuel pump, bad ignition switch, or weak battery. Confirm the fuel pump does NOT prime/buzz for ~2 seconds at key-on, check for power at the pump connector during cranking, and inspect the TIPM for water staining, corrosion, or melted/discolored terminals. A telling field test: lightly tapping or flexing the TIPM while a helper cranks can momentarily restore the connection and start the car — confirming an internal relay/solder fault (a diagnostic clue, not a repair). Repair options, cheapest to most durable: (1) Fuel-pump-relay bypass — install an external aftermarket relay kit (or VV-style plug-in bypass module) that takes the fuel pump load off the failing internal relay; lowest cost (~$50–$150 plus labor) and resolves the most common no-start/no-prime failure mode. (2) Professional TIPM rebuild/repair — specialty shops (e.g., Circuit Board Medics, MAKS/TIPM Rebuilders) re-solder and replace the failed relays/board components for roughly $200–$400 with a warranty; you ship your unit or swap, no dealer programming needed. (3) OEM TIPM replacement at the dealer — typically $700–$1,100+ for the part plus diagnosis and required dealer flash/programming to your VIN (a replacement TIPM will not work until it is programmed). Because the Challenger is excluded from the fuel-pump-relay recall, none of this is covered free unless the car is still under warranty — confirm your VIN against NHTSA recalls regardless, since campaign scope occasionally expands.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- MAKS/TIPM Rebuilders repair-and-return service for base TIPM 04692270
Repair the owner's original module only after power, ground, pump and terminal testing points to an internal TIPM failure Fitment: Exact 2008 Challenger/base-number 04692270 service; read the label on the original module before ordering …
- MAKS/TIPM Rebuilders repair-and-return service for base TIPM 68059370
Repair the original 2010 module after the no-prime/no-start fault is electrically isolated to the TIPM Fitment: Exact 2010 Challenger/base-number 68059370 service; module-label confirmation is mandatory $239 and Add to Cart on the live U…
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Sources for this issue (1)
Jeep Wrangler · 2018–2024
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. Stellantis acknowledged a broad list of Uconnect 5 failures across 2021-2024 vehicles in Technical Service Bulletin 08-008-24.
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. Apply the latest Uconnect software update per TSB 08-008-24, 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.
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)
Find U110E by make
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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?
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.
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?
Repair costs for U110E range from $700 to $1,200, depending on the vehicle and root cause.
Which vehicles are affected by U110E?
Au7o has documented U110E across 2 vehicle models from 2 manufacturers: Dodge, Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.