Fault Code Lookup › Network codes › U1120

U1120 Network · manufacturer code

U1120 fault code: what 9 owners reported

U1120 is a manufacturer-specific network code (network: communication between the car's control modules), so its exact definition belongs to the carmaker and is not in the generic OBD-II list. What it meant in practice is below, from 9 complaints owners filed with NHTSA. Updated November 9, 2026.

  • 9owner reports
  • 7car models
  • 0mention a crash
  • 0mention a fire
  • 2013–2020model years

Which cars get code U1120?

Every model whose owners mentioned U1120 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.

Where does U1120 show up?

By brand

  • Jeep5
  • Dodge3
  • Chrysler1

Component the owner filed it under

  1. Electrical System7 (77.8%)
  2. Power Train3 (33.3%)
  3. Engine2 (22.2%)
  4. Service Brakes2 (22.2%)
  5. Steering1 (11.1%)
  6. Electronic Stability Control (ESC)1 (11.1%)

Is there a recall for U1120?

The others concern the component owners file this code under (Electrical System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.

Electrical System: Instrument Cluster/Panel Chrysler (FCA US, LLC) is recalling certain 2020-2024 Jeep Gladiator and 2018-2024 Jeep Wrangler vehicles. The instrument panel cluster may experience an internal short circuit and fail. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 101… NHTSA campaign 24V652000 · September 5, 2024 · Affected cars

2020 Jeep Gladiator. Full risk and remedy on each car's report.

Electrical System: Wiring: Rear Compartment/TrunkPark outside Chrysler (FCA US, LLC) is recalling certain 2014-2016 Jeep Cherokee vehicles equipped with a power liftgate. An electrical short in the power liftgate module may lead to a vehicle fire with the ignition on or off. NHTSA campaign 23V338000 · May 11, 2023 · Affected cars

2015 Jeep Cherokee, 2014 Jeep Cherokee. Full risk and remedy on each car's report.

Electrical System: Wiring: Connectors/Plugs/Receptacles Chrysler (FCA US, LLC) is recalling certain 2017-2023 Pacifica Plug-In Hybrid Electric vehicles (PHEVs). An internal transmission wiring connector may short circuit, resulting in an unexpected engine shutdown. NHTSA campaign 23V010000 · January 17, 2023 · Affected cars

2017 Chrysler Pacifica. Full risk and remedy on each car's report.

Electrical System: 12v/24v/48v Battery Chrysler (FCA US LLC) is recalling certain 2017-2019 Pacifica vehicles equipped with engine stop/start systems. A loose battery ground connection may result in an intermittent loss of power steering assist and/or a stall. NHTSA campaign 19V348000 · May 9, 2019 · Affected cars

2017 Chrysler Pacifica. Full risk and remedy on each car's report.

Electrical System: Wiring: Front Underhood Chrysler (FCA US LLC) is recalling certain 2018 Jeep Renegade, Compass and Grand Cherokee, RAM 1500 and Promaster, Fiat 500x, Dodge Journey, Challenger, Charger and Durango and Chrysler 300x vehicles, 2017-2018 Jeep Wrangler, Dodge Grand Caravan and Chrysler Town and Country vehicles and 2018-2019… NHTSA campaign 18V524000 · August 9, 2018 · Affected cars

2017 Chrysler Pacifica. Full risk and remedy on each car's report.

Electrical System: Ignition: Anti-Theft: Control Module Chrysler (FCA US LLC) is recalling certain 2017-2018 Chrysler Pacifica vehicles. The Manual Park Release (MPR) plug may be removed without a tool. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 114, "Theft Protection." NHTSA campaign 18V395000 · June 14, 2018 · Affected cars

2017 Chrysler Pacifica. Full risk and remedy on each car's report.

Electrical System: Wiring Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler… NHTSA campaign 18V332000 · May 17, 2018 · Affected cars

2014 Dodge Charger, 2015 Jeep Cherokee, 2014 Jeep Cherokee, 2017 Chrysler Pacifica, 2014 Dodge Durango. Full risk and remedy on each car's report.

Electrical System: Software Chrysler (FCA US LLC) is recalling certain 2017 Chrysler Pacifica vehicles equipped with a 3.6l engine. The engine control software may become out of sync with the crankshaft position sensor, possibly resulting in an engine stall. NHTSA campaign 18V049000 · January 11, 2018 · Affected cars

2017 Chrysler Pacifica. Full risk and remedy on each car's report.

What happened when owners saw U1120?

8 of the 9 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.

WHILE DRIVING DASH STARTS BLONKING AND SEVERAL ISSUES APPEARED. STEARING, TRACTION CONTROL LIGHT, SERVICE KEY, ABS, AND OTHERS THAT I CAN'T REMEMBER HOWEVER SHOWING 7 DIFFERENT CODES P0133, U0101 U1110 U1120 I DON'T REMEMBER ALL OF IT. RESET COMPUTER AND DRIVE ABOUT 200 MILES AND SAME NOT SURE WHAT IS WRONG.
2013 Dodge ChargerElectrical SystemNHTSA complaint 11362939 · Oct 5, 2020
Error codes U1120, U1110, and U0121 all appeared at the same time. Car became undriveable while driving on the highway. Had to pull over with lost power and stop on the side of the highway. Tried to get the car started again and upon reignition the car cycled between air bag and transmission warnings. The car could not drive without reaching 7000+ RPMS at 5 mph. Ended up deserting the vehicle and had it towed to the nearest Jeep dealer. This is the 4th time the vehicle has broken down on the highway.
2014 Jeep CherokeeElectrical System, EngineNHTSA complaint 11432839 · Sep 13, 2021
TAKATA RECALL. VEHICLE DO NOT START, AND CHECK ENGINE LIGHT CAME ON.I TOOK IT TO O'REILLY'S AUTO PARTS AND CONNECTED THE MACHINE AND GIVE ME THE FOLLOWING ERRORS: P2122, U1110, U11BC, U0100, U0101, AND U1120 REFERENCE TO THE COMMUNICATION TO TCM, AND PCM WITH THE VEHICLE. I ALSO TOOK MY VEHICLE FOR A SOFTWARE RECALL WITH THE PCM.
2014 Dodge DurangoElectronic Stability Control (ESC)NHTSA complaint 11153349 · Nov 23, 2018
…A diagnostic scan retrieved multiple communication-related fault codes, including U0002-00 (CAN Bus Off), U0121-00 (Lost Communication with ABS Module), U0129-00 (Lost Communication with Brake System Control Module), U1110 (Lost Vehicle Speed Message), U1120 (Lost Wheel Distance Message), U1141 (Lost Brake and Torque Message), and U12A8 (Lost Communication with Master Cylinder Pressure Sensor). The problem is intermittent, often clears after restarting, and is difficult to diagnose. Because it affects critical safety systems while the vehicle is in motion, I believe this represents a serious safety
2019 Jeep CompassElectrical System, Unknown Or Other, Service BrakesNHTSA complaint 11748014 · Jul 2, 2026
…In this order U0121 U1110 U1120 U11BC U12AB P057C (Brake Pedal Sensor Circuit Low) U11BF U0001 High Speed Can Communication Bus P0000
2020 Jeep GladiatorSteering, Electrical System, Unknown Or OtherNHTSA complaint 11523399 · May 23, 2023
I purchased my 2015 Jeep Wrangler as a new vehicle in Missouri in 2015. The vehicle has been appropriately maintained with no major repairs and has approximately 17,251 miles. On the afternoon on [XXX], I cranked my vehicle and several warning lights came on. The check engine, ABS, traction control, and parking brake lights all illuminated. I took the vehicle to Advance Auto for an initial code scan and had error codes U1120 (lost wheel distance), U1110 (lost vehicle speed), and U0121 (lost communication system with ABS module). I dropped the vehicle off the next morning for further diagnostics at a local Meineke location. The scans at Meineke confirmed the same error codes with an…
2015 Jeep WranglerService BrakesNHTSA complaint 11770434 · Oct 11, 2026
…I PULLED FAULT CODES(U0101,U1110,U1120,U11BC,U0121,U0100,U212). I TOOK THE CAR TO DEALERSHIP 2 WEEKS PREVIOUSLY, THEY JUST RESET MY CEL LAMP AND SAID BRING IT BACK IF IT HAPPENS AGAIN. THIS IS DANGEROUS AND NEEDS TO BE TAKEN CARE OF BEFORE IT CAUSES SERIOUS INJURY OR DEATH! I BELIEVE THE PROBLEM IS WITH THE ECM AND TCM PROGRAMMING, OR THE MODULES THEMSELVES. INCLUDED IS SCREENSHOT FROM THE VIDEO I RECORDED AS IT STALLED ON THE FWY FOR THE 3RD TIME IN 10 MINUTESS.
2014 Dodge ChargerPower Train, Electrical System, Unknown Or OtherNHTSA complaint 10807120 · Nov 26, 2015
CHECK ENGINE LIGHT COMES ON, CODES ARE U1504, U1412, U0001, U1110, U1120, WILL NOT SHIFT, 4WD TEMPORARY UNAVAILABLE MESSAGE COMES ON , STABILITY TRACTION LIGHT COMES ON, ALL SHIFTER GEAR LIGHTS ARE ON, THIS HAD HAPPENED 7 TIMES SINCE I PURCHASED THIS JEEP, ENGINE HAS CUT A COUPLE OF TIMES DURING ALL OF THESE ISSUES!
2015 Jeep CherokeePower Train, Electrical System, EngineNHTSA complaint 11155145 · Nov 30, 2018

U1120: questions drivers ask

What does code U1120 mean?

U1120 is a manufacturer-specific network code (network: communication between the car's control modules), so its exact definition depends on the carmaker and is not in the generic OBD-II list. 9 owners reported it to NHTSA, most often for the Dodge Charger (2), Jeep Cherokee (2), Chrysler Pacifica (1); their reports describe what happened.

Which cars get code U1120 most often?

In NHTSA owner complaints, U1120 is mentioned most for the Dodge Charger (2), Jeep Cherokee (2), Chrysler Pacifica (1), across 7 models and model years 2013 to 2020. Popular models collect more reports because more of them are on the road.

Is there a recall for code U1120?

No NHTSA recall text names U1120 directly. 8 recalls on the cars that report this code concern the same component owners name most (Electrical System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.

What should I do if my car shows U1120?

Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.

How this page was made

CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of U1120. Manufacturer codes have no public standard definition, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.

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