Fault codes U01xx: lost communication with a control unit (1)
Communication codes between control units. The cause is often a connector, a wire, a power supply or a weak battery: the control unit named is not necessarily faulty.
Official codes: 182, from smallest to largest. Tap a code to get a direct link to share.
| Code | Meaning |
|---|---|
| U0100 | Lost Communication with ECM/PCM "A" |
| U0101 | Lost Communication with TCM |
| U0102 | Lost Communication with Transfer Case Control Module |
| U0103 | Lost Communication with Gear Shift Module |
| U0104 | Lost Communication with Cruise Control Module |
| U0105 | Lost Communication with Fuel Injector Control Module |
| U0106 | Lost Communication with Glow Plug Control Module |
| U0107 | Lost Communication with Throttle Actuator Control Module |
| U0108 | Lost Communication With Alternative Fuel Control Module |
| U0109 | Lost Communication with Fuel Pump Control Module |
| U010A | Lost Communication With Exhaust Gas Recirculation Control Module A |
| U010B | Lost Communication With Exhaust Gas Recirculation Control Module B |
| U010C | Lost Communication With Turbocharger/Supercharger Control Module A |
| U010D | Lost Communication With Turbocharger/Supercharger Control Module B |
| U010E | Lost Communication With Reductant Control Module |
| U010F | Lost Communication With Air Conditioning Control Module |
| U0110 | Lost Communication with Drive Motor Control Module |
| U0111 | Lost Communication with Battery Energy Control Module |
| U0112 | Lost Communication with Battery Energy Control Module "B" |
| U0113 | Lost Communication with Battery Charger A Control Module |
| U0114 | Lost Communication with 4WD Clutch Control Module |
| U0115 | Lost Communication with ECM/PCM "B" |
| U0116 | Lost Communication with Steering Effort Control Module |
| U0117 | Lost Communication with Drive Motor Control Module 2 |
| U0118 | Lost Communication with Cabin Air Quality Sensor Module |
| U0119 | Lost Communication with Steering Column Control Module |
| U011A | Lost Communication With Exhaust Gas Sensor Module A |
| U011B | Lost Communication With Rocker Arm Control Module A |
| U011C | Lost Communication With Rocker Arm Control Module B |
| U011D | Lost Communication With All Wheel Drive Control Module |
| U011E | Lost Communication With Throttle Actuator B Control Module |
| U011F | Lost Communication With V2X Module |
| U0120 | Lost Communication with Starter/Generator Control Module |
| U0121 | Lost Communication with ABS Control Module |
| U0122 | Lost Communication with Vehicle Dynamics Control Module |
| U0123 | Lost Communication with Yaw Rate Sensor Module |
| U0124 | Lost Communication with Lateral Acceleration Sensor Module |
| U0125 | Lost Communication with Multi-axis Acceleration Sensor |
| U0126 | Lost Communication with Steering Angle Sensor Module |
| U0127 | Lost Communication with Tire Pressure Monitor Module |
| U0128 | Lost Communication with Park Brake Control Module |
| U0129 | Lost Communication with Brake System Control Module |
| U012A | Lost Communication With Chassis Control Module A |
| U012B | Lost Communication With Chassis Control Module B |
| U012C | Lost Communication With Active Vibration Control Module |
| U012D | Lost Communication With Generator A Control Module |
| U012E | Lost Communication With Camshaft Position Control Module |
| U012F | Lost Communication With Generator B Control Module |
| U0130 | Lost Communication with Steering Effort Control Module B |
| U0131 | Lost Communication with Power Steering Control Module |
| U0132 | Lost Communication with Ride Level Control Module |
| U0133 | Lost Communication with Yaw Rate Sensor Module |
| U0134 | Lost Communication with Restraints System Sensor (Side Sensor) |
| U0135 | Lost Communication with Parking Brake Control Module |
| U0136 | Lost Communication with Park Brake Module B |
| U0137 | Lost Communication with Trailer Brake Control Module |
| U0138 | Lost Communication with All Terrain Control Module |
| U0139 | Lost Communication with Active Roll Control Module |
| U013C | Lost Communication With Accelerator Pedal Module |
| U013D | Lost Communication With Vacuum Sensor A |
| U013E | Lost Communication With Vacuum Sensor B |
| U013F | Lost Communication With Pedestrian Alert Control Module |
| U0140 | Lost Communication with Body Control Module |
| U0141 | Lost Communication with Body Control Module A |
| U0142 | Lost Communication with Body Control Module B |
| U0143 | Lost Communication with Body Control Module C |
| U0144 | Lost Communication with Personalization Module "B" |
| U0145 | Lost Communication with Restraints Control Module Auxiliary |
| U0146 | Lost Communication with Gateway "A" |
| U0147 | Lost Communication with Gateway "B" |
| U0148 | Lost Communication with Body Control Module "C" |
| U0149 | Lost Communication with Door Driver Module |
| U014A | Lost Communication With Battery Energy Control Module C |
| U014B | Lost Communication With Hybrid/EV Battery Inductive Charging Module |
| U014C | Lost Communication With Battery Energy Control Module D |
| U014D | Lost Communication with Mirror Control Module B |
| U014E | Lost Communication With Multi-axis Acceleration Sensor Module B |
| U0150 | Lost Communication with Side Object Detection Control Module Left |
| U0151 | Lost Communication with Restraints Control Module |
| U0152 | Lost Communication with Side Restraints Control Module Left |
| U0153 | Lost Communication with Restraints Control Module B |
| U0154 | Lost Communication with Restraints Occupant Sensing Module |
| U0155 | Lost Communication with Instrument Panel Cluster |
| U0156 | Lost Communication with Information Center "A" |
| U0157 | Lost Communication with Personalization Control Module |
| U0158 | Lost Communication with Head Up Display |
| U0159 | Lost Communication with Parking Assist Module |
| U015A | Lost Communication With Anti-Lock Brake System (ABS) Control Module B |
| U015B | Lost Communication With Power Steering Control Module B |
| U015C | Lost Communication With Automated Driving System Control Module A |
| U015D | Lost Communication With Automated Driving System Control Module B |
| U015E | Lost Communication With Automated Driving System Interface Module A |
| U015F | Lost Communication With Automated Driving System Interface Module B |
| U0160 | Lost Communication with Audible Alert Control Module |
| U0161 | Lost Communication with Compass Module |
| U0162 | Lost Communication with Navigation Display Module |
| U0163 | Lost Communication with Navigation Control Module |
| U0164 | Lost Communication with HVAC Control Module |
| U0165 | Lost Communication with Auxiliary HVAC Control Module |
| U0166 | Lost Communication with Auxiliary Heater Control Module |
| U0167 | Lost Communication with Vehicle Immobiliser Control Module |
| U0168 | Lost Communication with Vehicle Immobilizer Control Module |
| U0169 | Lost Communication with Sun Roof Control Module |
| U016A | Lost Communication With Global Positioning System Module |
| U016B | Lost Communication With A/C Compressor Control Module |
| U016C | Lost Communication With Fuel Pump Control Module B |
| U016D | Lost Communication With Exhaust Gas Sensor Module B |
| U0170 | Lost Communication with Restraints Front Sensor "B" |
| U0171 | Lost Communication with Restraints Rear Sensor "A" |
| U0172 | Lost Communication with Restraints Rear Sensor "B" |
| U0173 | Communication Bus "C" Off |
| U0174 | Lost Communication With Restraints System Sensor E |
| U0175 | Lost Communication With Restraints System Sensor F |
| U0176 | Lost Communication With Restraints System Sensor G |
| U0177 | Lost Communication with Mirror Memory Module |
| U0178 | Lost Communication With Restraints System Sensor I |
| U0179 | Lost Communication with Power Liftgate Control Module |
| U017A | Lost Communication With Restraints System Sensor K |
| U017B | Lost Communication With Restraints System Sensor L |
| U017C | Lost Communication With Restraints System Sensor M |
| U017D | Lost Communication With Restraints System Sensor N |
| U017E | Lost Communication With Seat Belt Pretensioner Module A |
| U017F | Lost Communication With Seat Belt Pretensioner Module B |
| U0180 | Lost Communication with Automatic Lighting Control Module |
| U0181 | Lost Communication with Auto Park Brake Module |
| U0182 | Lost Communication with Headlamp Leveling Control Module |
| U0183 | Lost Communication with Sunroof Control Module |
| U0184 | Lost Communication with Radio |
| U0185 | Lost Communication with Antenna Control Module |
| U0186 | Lost Communication with Audio Amplifier |
| U0187 | Lost Communication with Disc Player Module |
| U0188 | Lost Communication with Audio Rear Control Module |
| U0189 | Lost Communication with Auxiliary Heater Control Module |
| U018A | Lost Communication With Headlamp Leveling Control Module B |
| U0190 | Lost Communication with Subwoofer Amplifier Module |
| U0191 | Lost Communication with Television Tuner Module |
| U0192 | Lost Communication with Personal Computer |
| U0193 | Lost Communication with Mobile Phone Module |
| U0194 | Lost Communication with Personal Assist Module |
| U0195 | Lost Communication with Satellite Radio Receiver Module |
| U0196 | Lost Communication with Rear Seat Entertainment Control Module |
| U0197 | Lost Communication with Hands-Free Phone Control Module |
| U0198 | Lost Communication with Telematic Control Module |
| U0199 | Lost Communication with Door Control Module |
| U019A | Lost Communication With Tachograph Module |
| U019B | Lost Communication With Battery Charger Control Module A |
| U019C | Lost Communication With Glow Plug Control Module 2 |
| U019D | Lost Communication With Direct Ozone Reduction Catalyst Temperature Sensor |
| U019E | Lost Communication With Transmission Range Control Module |
| U019F | Lost Communication With Engine Coolant Pump Control Module |
| U01A0 | Lost Communication With Hybrid/EV Battery Interface Control Module A |
| U01A1 | Lost Communication With Hybrid/EV Battery Interface Control Module B |
| U01A2 | Lost Communication With Hybrid/EV Battery Interface Control Module C |
| U01A3 | Lost Communication With Hybrid/EV Battery Interface Control Module D |
| U01A4 | Lost Communication With Hybrid/EV Battery Interface Control Module E |
| U01A5 | Lost Communication With Hybrid/EV Battery Interface Control Module F |
| U01A6 | Lost Communication With Hybrid/EV Battery Interface Control Module G |
| U01A7 | Lost Communication With Hybrid/EV Battery Interface Control Module H |
| U01A8 | Lost Communication With Hybrid/EV Battery Interface Control Module I |
| U01A9 | Lost Communication With Hybrid/EV Battery Interface Control Module J |
| U01AA | Lost Communication With Hybrid/EV Battery Interface Control Module K |
| U01AB | Lost Communication With Hybrid/EV Battery Interface Control Module L |
| U01AC | Lost Communication With Hybrid/EV Battery Interface Control Module M |
| U01AD | Lost Communication With Hybrid/EV Battery Interface Control Module N |
| U01AE | Lost Communication With Hybrid/EV Battery Interface Control Module O |
| U01AF | Lost Communication With Hybrid/EV Battery Interface Control Module P |
| U01B0 | Lost Communication With Battery Monitor Module |
| U01B1 | Lost Communication With Particulate Matter Sensor B |
| U01B2 | Lost Communication With Planetary Gear Set Control Module |
| U01B3 | Lost Communication With Brake Blending Actuator |
| U01B4 | Lost Communication With Brake System Control Module B |
| U01B5 | Lost Communication With Catalyst Heater Control Module |
| U01B6 | Lost Communication With Fuel Heater Control Module |
| U01B7 | Lost Communication With Switch Input Module A |
| U01B8 | Lost Communication With Switch Input Module B |
| U01B9 | Lost Communication With Switch Input Module C |
| U01BA | Lost Communication With Park Lock/Pawl Control Module |
| U01BB | Lost Communication With Battery Charger Control Module B |
| U01BC | Lost Communication With Charge Air Cooler Coolant Pump B |
| U01BD | Lost Communication With DC/DC Converter Control Module C |
| U01BE | Lost Communication with Drive Motor A Clutch Actuator |
| U01BF | Lost Communication with Battery Management Control Module |
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Official meanings: OBDex (public domain, CC0). Manufacturer codes: dtc-database (MIT license), probable meanings not verified by the manufacturers. The same meaning can vary depending on the model: always have a diagnosis confirmed by a professional.