U01xx codes: Network codes U0100-U0199
182 network trouble codes from U0100 to U01BF. They mostly involve the CAN bus wiring, CAN bus, communication bus and crash signal wiring.
All U01xx codes
82 of these codes usually turn on the check engine light; 23 can often be fixed at home.
| Code | Meaning | Difficulty |
|---|---|---|
| U0100 | Lost Communication With ECM/PCM A | Medium |
| U0101 | Lost Communication With TCM | Medium |
| U0102 | Lost Communication With Transfer Case Control Module | Medium |
| U0103 | Lost Communication With Gear Shift Control Module A | Medium |
| U0104 | Lost Communication With Cruise Control Module | Medium |
| U0105 | Lost Communication With Fuel Injector Control Module | Hard |
| U0106 | Lost Communication With Glow Plug Control Module 1 | Medium |
| U0107 | Lost Communication With Throttle Actuator A Control Module | Medium |
| U0108 | Lost Communication With Alternative Fuel Control Module | Medium |
| U0109 | Lost Communication With Fuel Pump Control Module A | Medium |
| U010A | Lost Communication With Exhaust Gas Recirculation Control Module A | Medium |
| U010B | Lost Communication With Exhaust Gas Recirculation Control Module B | Medium |
| U010C | Lost Communication With Turbocharger/Supercharger Control Module A | Hard |
| U010D | Lost Communication With Turbocharger/Supercharger Control Module B | Hard |
| U010E | Lost Communication With Reductant Control Module | Medium |
| U010F | Lost Communication With Air Conditioning Control Module | Medium |
| U0110 | Lost Communication With Drive Motor Control Module A | Workshop only |
| U0111 | Lost Communication With Battery Energy Control Module A | Workshop only |
| U0112 | Lost Communication With Battery Energy Control Module B | Workshop only |
| U0113 | Lost Communication With Emissions Critical Control Information | Workshop only |
| U0114 | Lost Communication With Four-Wheel Drive Clutch Control Module | Medium |
| U0115 | Lost Communication With ECM/PCM B | Workshop only |
| U0116 | Lost Communication With Coolant Temperature Control Module | Medium |
| U0117 | Lost Communication With PTO Control Module | Medium |
| U0118 | Lost Communication With Fuel Additive Control Module | Medium |
| U0119 | Lost Communication With Fuel Cell Control Module | Workshop only |
| U011A | Lost Communication With Exhaust Gas Sensor Module A | Medium |
| U011B | Lost Communication With Rocker Arm Control Module A | Medium |
| U011C | Lost Communication With Rocker Arm Control Module B | Medium |
| U011D | Lost Communication With All Wheel Drive Control Module | Medium |
| U011E | Lost Communication With Throttle Actuator B Control Module | Medium |
| U011F | Lost Communication With V2X Module | Medium |
| U0120 | Lost Communication With Starter/Generator Control Module | Workshop only |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module A | Medium |
| U0122 | Lost Communication With Vehicle Dynamics Control Module | Medium |
| U0123 | Lost Communication With Yaw Rate Sensor Module | Medium |
| U0124 | Lost Communication With Lateral Acceleration Sensor Module | Medium |
| U0125 | Lost Communication With Multi-axis Acceleration Sensor Module A | Medium |
| U0126 | Lost Communication With Steering Angle Sensor Module | Medium |
| U0127 | Lost Communication With Tire Pressure Monitor Module | Medium |
| U0128 | Lost Communication With Park Brake Control Module | Medium |
| U0129 | Lost Communication With Brake System Control Module A | Medium |
| U012A | Lost Communication With Chassis Control Module A | Medium |
| U012B | Lost Communication With Chassis Control Module B | Medium |
| U012C | Lost Communication With Active Vibration Control Module | Medium |
| U012D | Lost Communication With Generator A Control Module | Medium |
| U012E | Lost Communication With Camshaft Position Control Module | Hard |
| U012F | Lost Communication With Generator B Control Module | Medium |
| U0130 | Lost Communication With Steering Effort Control Module | Medium |
| U0131 | Lost Communication With Power Steering Control Module A | Medium |
| U0132 | Lost Communication With Suspension Control Module A | Medium |
| U0133 | Lost Communication With Active Roll Control Module | Hard |
| U0134 | Lost Communication With Power Steering Control Module - Rear | Hard |
| U0135 | Lost Communication With Differential Control Module - Front | Hard |
| U0136 | Lost Communication With Differential Control Module - Rear | Hard |
| U0137 | Lost Communication With Trailer Brake Control Module | Medium |
| U0138 | Lost Communication With All Terrain Control Module | Medium |
| U0139 | Lost Communication With Suspension Control Module B | Medium |
| U013C | Lost Communication With Accelerator Pedal Module | Medium |
| U013D | Lost Communication With Vacuum Sensor A | Medium |
| U013E | Lost Communication With Vacuum Sensor B | Medium |
| U013F | Lost Communication With Pedestrian Alert Control Module | Medium |
| U0140 | Lost Communication With Body Control Module | Medium |
| U0141 | Lost Communication With Body Control Module A | Medium |
| U0142 | Lost Communication With Body Control Module B | Medium |
| U0143 | Lost Communication With Body Control Module C | Medium |
| U0144 | Lost Communication With Body Control Module D | Medium |
| U0145 | Lost Communication With Body Control Module E | Medium |
| U0146 | Lost Communication With Serial Data Gateway Module A | Medium |
| U0147 | Lost Communication With Serial Data Gateway Module B | Medium |
| U0148 | Lost Communication With Gateway C | Hard |
| U0149 | Lost Communication With Gateway D | Hard |
| U014A | Lost Communication With Battery Energy Control Module C | Workshop only |
| U014B | Lost Communication With Hybrid/EV Battery Inductive Charging Module | Workshop only |
| U014C | Lost Communication With Battery Energy Control Module D | Workshop only |
| U014D | Lost Communication With Mirror Control Module B | Medium |
| U014E | Lost Communication With Multi-axis Acceleration Sensor Module B | Medium |
| U0150 | Lost Communication With Gateway E | Hard |
| U0151 | Lost Communication With Restraints Control Module | Workshop only |
| U0152 | Lost Communication With Side Restraints Control Module - Left | Workshop only |
| U0153 | Lost Communication With Side Restraints Control Module Right | Workshop only |
| U0154 | Lost Communication With Restraints Occupant Classification System Module | Workshop only |
| U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | Medium |
| U0156 | Lost Communication With Information Center A | Medium |
| U0157 | Lost Communication With Information Center B | Medium |
| U0158 | Lost Communication With Head Up Display | Medium |
| U0159 | Lost Communication With Parking Assist Control Module A | Medium |
| U015A | Lost Communication With Anti-Lock Brake System (ABS) Control Module B | Workshop only |
| U015B | Lost Communication With Power Steering Control Module B | Workshop only |
| U015C | Lost Communication With Automated Driving System Control Module A | Workshop only |
| U015D | Lost Communication With Automated Driving System Control Module B | Workshop only |
| U015E | Lost Communication With Automated Driving System Interface Module A | Workshop only |
| U015F | Lost Communication With Automated Driving System Interface Module B | Workshop only |
| U0160 | Lost Communication With Audible Alert Control Module | Medium |
| U0161 | Lost Communication With Compass Module | Medium |
| U0162 | Lost Communication With Navigation Display Module | Medium |
| U0163 | Lost Communication With Navigation Control Module | Medium |
| U0164 | Lost Communication With HVAC Control Module | Medium |
| U0165 | Lost Communication With HVAC Control Module - Rear | Medium |
| U0166 | Lost Communication With Auxiliary Heater Control Module | Medium |
| U0167 | Lost Communication With Vehicle Immobilizer Control Module | Hard |
| U0168 | Lost Communication With Vehicle Security Control Module | Hard |
| U0169 | Lost Communication With Sunroof Control Module | Medium |
| U016A | Lost Communication With Global Positioning System Module | Medium |
| U016B | Lost Communication With A/C Compressor Control Module | Workshop only |
| U016C | Lost Communication With Fuel Pump Control Module B | Medium |
| U016D | Lost Communication With Exhaust Gas Sensor Module B | Medium |
| U0170 | Lost Communication With Restraints System Sensor A | Workshop only |
| U0171 | Lost Communication With Restraints System Sensor B | Workshop only |
| U0172 | Lost Communication With Restraints System Sensor C | Workshop only |
| U0173 | Lost Communication With Restraints System Sensor D | Workshop only |
| U0174 | Lost Communication With Restraints System Sensor E | Workshop only |
| U0175 | Lost Communication With Restraints System Sensor F | Workshop only |
| U0176 | Lost Communication With Restraints System Sensor G | Workshop only |
| U0177 | Lost Communication With Restraints System Sensor H | Workshop only |
| U0178 | Lost Communication With Restraints System Sensor I | Workshop only |
| U0179 | Lost Communication With Restraints System Sensor J | Workshop only |
| U017A | Lost Communication With Restraints System Sensor K | Workshop only |
| U017B | Lost Communication With Restraints System Sensor L | Workshop only |
| U017C | Lost Communication With Restraints System Sensor M | Workshop only |
| U017D | Lost Communication With Restraints System Sensor N | Workshop only |
| U017E | Lost Communication With Seat Belt Pretensioner Module A | Workshop only |
| U017F | Lost Communication With Seat Belt Pretensioner Module B | Workshop only |
| U0180 | Lost Communication With Automatic Lighting Control Module | Medium |
| U0181 | Lost Communication With Headlamp Leveling Control Module | Medium |
| U0182 | Lost Communication With Lighting Control Module Front | Medium |
| U0183 | Lost Communication With Lighting Control Module - Rear A | Medium |
| U0184 | Lost Communication With Radio | Medium |
| U0185 | Lost Communication With Antenna Control Module | Medium |
| U0186 | Lost Communication With Audio Amplifier A | Medium |
| U0187 | Lost Communication With Digital Disc Player/Changer Module A | Easy |
| U0188 | Lost Communication With Digital Disc Player/Changer Module B | Easy |
| U0189 | Lost Communication With Digital Disc Player/Changer Module C | Easy |
| U018A | Lost Communication With Headlamp Leveling Control Module B | Medium |
| U0190 | Lost Communication With Digital Disc Player/Changer Module D | Easy |
| U0191 | Lost Communication With Television | Medium |
| U0192 | Lost Communication With Personal Computer | Easy |
| U0193 | Lost Communication With Digital Audio Control Module A | Medium |
| U0194 | Lost Communication With Digital Audio Control Module B | Medium |
| U0195 | Lost Communication With Subscription Entertainment Receiver Module | Medium |
| U0196 | Lost Communication With Entertainment Control Module - Rear A | Medium |
| U0197 | Lost Communication With Telephone Control Module | Medium |
| U0198 | Lost Communication With Telematic Control Module | Medium |
| U0199 | Lost Communication With Door Control Module A | Medium |
| U019A | Lost Communication With Tachograph Module | Hard |
| U019B | Lost Communication With Battery Charger Control Module A | Hard |
| U019C | Lost Communication With Glow Plug Control Module 2 | Medium |
| U019D | Lost Communication With Direct Ozone Reduction Catalyst Temperature Sensor | Medium |
| U019E | Lost Communication With Transmission Range Control Module | Hard |
| U019F | Lost Communication With Engine Coolant Pump Control Module | Medium |
| U01A0 | Lost Communication With Hybrid/EV Battery Interface Control Module A | Workshop only |
| U01A1 | Lost Communication With Hybrid/EV Battery Interface Control Module B | Workshop only |
| U01A2 | Lost Communication With Hybrid/EV Battery Interface Control Module C | Workshop only |
| U01A3 | Lost Communication With Hybrid/EV Battery Interface Control Module D | Workshop only |
| U01A4 | Lost Communication With Hybrid/EV Battery Interface Control Module E | Workshop only |
| U01A5 | Lost Communication With Hybrid/EV Battery Interface Control Module F | Workshop only |
| U01A6 | Lost Communication With Hybrid/EV Battery Interface Control Module G | Workshop only |
| U01A7 | Lost Communication With Hybrid/EV Battery Interface Control Module H | Workshop only |
| U01A8 | Lost Communication With Hybrid/EV Battery Interface Control Module I | Workshop only |
| U01A9 | Lost Communication With Hybrid/EV Battery Interface Control Module J | Workshop only |
| U01AA | Lost Communication With Hybrid/EV Battery Interface Control Module K | Workshop only |
| U01AB | Lost Communication With Hybrid/EV Battery Interface Control Module L | Workshop only |
| U01AC | Lost Communication With Hybrid/EV Battery Interface Control Module M | Workshop only |
| U01AD | Lost Communication With Hybrid/EV Battery Interface Control Module N | Workshop only |
| U01AE | Lost Communication With Hybrid/EV Battery Interface Control Module O | Workshop only |
| U01AF | Lost Communication With Hybrid/EV Battery Interface Control Module P | Workshop only |
| U01B0 | Lost Communication With Battery Monitor Module | Medium |
| U01B1 | Lost Communication With Particulate Matter Sensor B | Medium |
| U01B2 | Lost Communication With Planetary Gear Set Control Module | Hard |
| U01B3 | Lost Communication With Brake Blending Actuator | Hard |
| U01B4 | Lost Communication With Brake System Control Module B | Medium |
| U01B5 | Lost Communication With Catalyst Heater Control Module | Hard |
| U01B6 | Lost Communication With Fuel Heater Control Module | Medium |
| U01B7 | Lost Communication With Switch Input Module A | Medium |
| U01B8 | Lost Communication With Switch Input Module B | Medium |
| U01B9 | Lost Communication With Switch Input Module C | Medium |
| U01BA | Lost Communication With Park Lock/Pawl Control Module | Hard |
| U01BB | Lost Communication With Battery Charger Control Module B | Workshop only |
| U01BC | Lost Communication With Charge Air Cooler Coolant Pump B | Medium |
| U01BD | Lost Communication With DC/DC Converter Control Module C | Workshop only |
| U01BE | Lost Communication With Drive Motor A Clutch Actuator | Workshop only |
| U01BF | Lost Communication With Battery Management Control Module | Hard |