Control Module U Code List
WARNING: This page is about a different car, the 2013 GMC Acadia, 2013 Chevrolet Traverse, and 2013 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
This list includes all Data Communications related U-code DTCs in alphanumeric order with descriptors for all modules. Not all DTCs listed will be applicable to all vehicles.
Control Module U Code List
| DTC | DTC Descriptor |
|---|---|
| U0001 00 | High Speed CAN Bus Malfunction |
| U0002 00 | High Speed CAN Bus |
| U0010 00 | Medium Speed CAN Bus |
| U0020 00 | Low Speed CAN Bus |
| U0073 00 | Control Module Communication Bus A Off |
| U0073 71 | ECU HS Bus Off |
| U0073 72 | ECU LS Bus Off |
| U0074 00 | Control Module Communication Bus B Off |
| U0075 00 | Control Module Communication Bus C Off |
| U0100 00 | Lost Communication with Engine/Powertrain Control Module (ECM/PCM) |
| U0100 75 | Lost Communication with Engine/Powertrain Control Module (ECM) |
| U0100 7F | Lost Communication with Engine/Powertrain Control Module (ECM) |
| U0101 00 | Lost Communication with Transmission Control Module (TCM) |
| U0101 75 | Lost Communication with Transmission Control Module (TCM) |
| U0102 00 | Lost Communication with Transfer Case Control Module |
| U0104 00 | Lost Communication with Cruise Control Module |
| U0104 7F | Lost Communication with Cruise Control Module |
| U0106 00 | Lost Communication with Glow Plug Control Module |
| U0109 00 | Lost Communication with Fuel Pump Control Module |
| U010E 00 | Lost Communication with Reductant Sensor Module |
| U010F 00 | Lost Communication with Air Conditioning Control Module |
| U0111 00 | Lost Communication with Battery Energy Control Module |
| U0115 00 | Lost Communication with ECM/PCM B |
| U0117 00 | Lost Communication PTO Control Module |
| U0121 00 | Lost Communication with Electronic Brake Control Module (EBCM) |
| U0122 00 | Lost Communication with Vehicle Stability Control Module (ESCM) |
| U0123 00 | Lost Communication with Yaw Rate Sensor Module |
| U0126 00 | Lost Communication with Steering Wheel Angle Sensor Module |
| U0128 00 | Lost Communication with Park Brake Control Module |
| U0129 00 | Lost Communication with Brake System Control Module |
| U0131 00 | Lost Communication with Power Steering Control Module |
| U0132 00 | Lost Communication with Suspension Control Module |
| U0134 00 | Lost Communication with Power Steering Control Module - Rear |
| U0136 00 | Lost Communication with Differential Control Module - Rear |
| U0137 00 | Lost Communication with Trailer Brake Control Module |
| U0140 00 | Lost Communication with Body Control Module |
| U0141 00 | Lost Communication with Body Control Module A |
| U0144 00 | Lost Communication with Body Control Module D |
| U0146 00 | Lost Communication with Gateway A |
| U0151 00 | Lost Communication with Inflatable Restraint Sensing and Diagnostic Module (SDM) |
| U0151 71 | Lost Communication with Inflatable Restraint Sensing and Diagnostic Module (SDM) Invalid Serial Data Received |
| U0151 7F | Lost Communication with Restraints Control Inflatable Restraint Sensing and Diagnostic Module (SDM) Erratic |
| U0155 00 | Lost Communication with Instrument Panel Cluster (IPC) Control Module |
| U0156 00 | Lost Communication with Information Center A (DIC) |
| U0157 00 | Lost Communication with Information Center B (DID) |
| U0158 00 | Lost Communication with Head Up Display |
| U0159 00 | Lost Communication with Parking Assist Control Module (RPA) |
| U0160 00 | Lost Communication with Chime Alarm Control Module |
| U0164 00 | Lost Communication with HVAC Control Module |
| U0165 00 | Loss of Communication with HVAC Control Module - Rear |
| U0166 00 | Lost Communication with Auxiliary Heater Control Module |
| U0168 00 | Lost Communication with Vehicle Security Control Module |
| U0170 00 | Lost Communication with Restraints System Sensor A (PPS) |
| U0172 00 | Lost Communication with Restraints System Sensor C |
| U0173 00 | Lost Communication with Restraints System Sensor D |
| U0181 00 | Lost Communication with Headlamp Leveling Control Module |
| U0184 00 | Lost Communication with Radio |
| U0186 00 | Lost Communication with Audio Amplifier |
| U0191 00 | Lost Communication with Television |
| U0194 00 | Lost Communication with Digital Radio Receiver (DRR) |
| U0196 00 | Lost Communication with Rear Audio Control Module |
| U0198 00 | Lost Communication with Telematic Control Module |
| U0199 00 | Lost Communication with Driver Door Control Module |
| U0200 00 | Lost Communication with Door Control Module |
| U0208 00 | Lost Communication with Seat Control Module A (DSM/MSM) |
| U0209 00 | Lost Communication with Seat Control Module B (HVSM) |
| U0210 00 | Lost Communication with Seat Control Module C (RHSM) |
| U0214 00 | Lost Communication with Remote Function Actuation |
| U0230 00 | Lost Communication with Rear Gate Module |
| U0232 00 | Lost Communication with Side Object Detection (SOD) Module - Left |
| U0233 00 | Lost Communication with Side Object Detection (SOD) Module - Right |
| U0236 00 | Lost Communication with Column Locking Module (CLM) |
| U023A 00 | Lost Communication with Vehicle Direction Camera Control Module (Lane Departure Warning) |
| U0241 00 | Lost Communication with Headlamp Control Module A |
| U0249 00 | Loss of Communication with Entertainment Control Module - Rear B |
| U0252 00 | Lost Communication with Trailer Interface Module |
| U0255 00 | Loss of Communication with Front Display Interface Module |
| U0256 00 | Loss of Communication with Front Controls Interface Module |
| U0257 00 | Loss of Communication with Front Controls/Display Interface Module |
| U0293 00 | Lost Communication with HP2 Powertrain Control Module |
| U029D 00 | Lost Communication with NOX Sensor Module 1 |
| U029E 00 | Lost Communication with NOX Sensor Module 2 |
| U0401 00 | Invalid Data Received From ECM |
| U0401 72 | Invalid Data Received From ECM Message Counter Incorrect |
| U0401 74 | Invalid Data Received From ECM Bus Signal Checksum Error |
| U0402 72 | Invalid Data Received From Transmission Control Module Message Counter Incorrect |
| U0402 73 | Invalid Data Received From Transmission Control Module Parity Error |
| U0402 74 | Invalid Data Received From Transmission Control Module Bus Signal Checksum Error |
| U0405 00 | Invalid Data Received From Cruise Module |
| U0405 71 | Invalid Data Received From Cruise Control Module Invalid Data |
| U0405 72 | Invalid Data Received From Cruise Control Module Message Counter Incorrect |
| U0405 74 | Invalid Data Received From Cruise Control Module Bus Signal Checksum Error |
| U0415 00 | Invalid Data Received From Electronic Brake Control Module |
| U0415 72 | Invalid Data Received From Electronic Brake Control Module Message Counter Incorrect |
| U0415 74 | Invalid Data Received From Electronic Brake Control Module Bus Signal Checksum Error |
| U0416 00 | Invalid Data Received From Vehicle Dynamics Control Module |
| U0416 72 | Invalid Data Received From Vehicle Dynamics Control Module Message Counter Incorrect |
| U0416 74 | Invalid Data Received From Vehicle Dynamics Control Module Bus Signal Checksum Error |
| U0418 00 | Invalid Data Received From Brake System Control Module |
| U0418 71 | Invalid Data Received From Brake System Control Module Invalid Data |
| U0418 72 | Invalid Data Received From Brake System Control Module Message Counter Incorrect |
| U0422 00 | Invalid Data Received From Body Control Module |
| U0422 70 | Invalid Data Received From Body Control Module |
| U0422 72 | Invalid Data Received From Body Control Module Message Counter Incorrect |
| U0422 74 | Invalid Data Received From Body Control Module Bus Signal Checksum Error |
| U0424 00 | Invalid Data Received From HVAC Control Module |
| U0432 00 | Invalid Data Received From Multi-Axis Acceleration Sensor Module |
| U0432 72 | Invalid Data Received From Multi-Axis Acceleration Sensor Module Message Counter Incorrect |
| U0432 74 | Invalid Data Received From Multi-Axis Acceleration Sensor Module Bus Signal Checksum Error |
| U0438 71 | Invalid Data Received From Trailer Brake Control Module |
| U0465 00 | Invalid Data Received From Power Take-Off Control Module |
| U180F | Electronic Brake Control Module Communications Bus B OFF |
| U1000 | Class 2 Data Link Malfunction |
| U1016 | Lost Communication with ECM/PCM |
| U1017 | Lost Communication with Engine Control System |
| U1024 | Lost Communication with Transmission Control Module |
| U1026 | Lost Communication with Transfer Case Control Module |
| U1040 | Lost Communication with Electronic Brake Control Module |
| U1041 | Lost Communication with Electronic Brake Control Module |
| U1064 | Lost Communication with Body Control Module/Dash Integration Module |
| U1088 | Lost Communication with Inflatable Restraint Sensing and Diagnostic Module |
| U1096 | Lost Communication with Instrument Panel Cluster |
| U1098 | Lost Communication with Secondary Information Center |
| U1099 | Lost Communication with Head Up Display |
| U1100 | Lost Communication with Driver Information and Displays Control System |
| U1128 | Lost Communication with Radio |
| U1129 | Lost Communication with Amplifier |
| U1133 | Lost Communication with Mini Disc Changer |
| U1137 | Lost Communication with Satellite Digital Audio Reception System (DRR) |
| U1153 | Lost Communication with Climate Control Panel |
| U1162 | Lost Communication with Liftgate Module |
| U1164 | Lost Communication with Driver Door Switch |
| U1165 | Lost Communication with Passenger Door Switch |
| U1176 | Lost Communication with Remote Function Actuation |
| U1177 | Lost Communication with Folding Top Controller |
| U1192 | Lost Communication with Immobilizer |
| U1193 | Lost Communication with Remote Control Door Lock Receiver |
| U1255 | Loss of Class 2 Communication |
| U1300 | Class 2 Data Link Low |
| U1301 | Class 2 Data Link High |
| U1305 | Class 2 Data Link High or Low |
| U1500 00 | Inter Device Dedicated Bus |
| U1500 00 | (EBCM) Inter Device Dedicated Bus (Lost Communication with Yaw and Lateral Accelerometer Sensor) |
| U1500 00 | (DDM/PDM) Inter Device Dedicated Bus (Lost Communication with Front Window Motor) |
| U1500 01 | Inter-Device Dedicated Bus Short to Battery |
| U1500 02 | Inter-Device Dedicated Bus Short to Ground |
| U1511 00 | (BCM) Inter-device Dedicated Bus 1 Lost Communication with Device 1 (Electronic Compass Module) |
| U1511 00 | (DDM/PDM) Inter-device Dedicated Bus 1 Lost Communication with Device 1 (Front Window Motor) |
| U1511 00 | (HCM) Inter-device Dedicated Bus 1 Lost Communication with Device 1 (AFL - Left) |
| U1512 00 | (DDM) Inter-device Dedicated Bus 1 Lost Communication with Device 2 (Left Rear Window Motor) |
| U1513 00 | (PDM) Inter-device Dedicated Bus 1 Lost Communication with Device 3 (Right Rear Window Motor) |
| U1521 00 | (HCM) Inter-device Dedicated Bus 2 Lost Communication with Device 1 (AFL - Right) |
| U1650 00 | Chassis System Dedicated Bus Controller |
| U1651 00 | Chassis System Dedicated Bus Sensor |
| U180F 00 | Control Module Communication Bus B Off |
| U1802 00 | Lost Communication with Fuel Pump Control Module |
| U1812 00 | Battery Energy Control Module Bus B High Speed Communication Enable Circuit Low |
| U1813 00 | Battery Energy Control Module Bus B High Speed Communication Enable Circuit High |
| U1814 00 | Powertrain High Speed Communication Enable Circuit |
| U1815 00 | Lost Communication with Drive Motor Control Module A on Bus B |
| U1816 00 | Lost Communication with Drive Motor Control Module B on Bus B |
| U1817 00 | Lost Communication with Hybrid Powertrain Control Module on Bus B |
| U1818 00 | Lost Communication with ECM/PCM A on Bus B |
| U1820 00 | Lost Communication with Brake System Control Module on Bus B |
| U1821 00 | Lost Communication with DC to DC Converter Control Module A on Bus B |
| U1822 00 | Lost Communications with Power Steering Control Module on Bus B |
| U1823 00 | Lost Communications with Cruise Control Module on Bus B |
| U1824 00 | Lost Communications with Suspension Control Module |
| U1825 00 | Lost Communications with Vehicle Dynamics Control Module |
| U1826 71 | Lost Communication with Multi-Axis Acceleration Sensor Module on Bus B Invalid Serial Data Received |
| U1826 72 | Lost Communication with Multi-Axis Acceleration Sensor Module on Bus B Alive Counter Incorrect/Not Updated |
| U1826 7F | Lost Communication with Multi-Axis Acceleration Sensor Module on Bus B Erratic |
| U1827 71 | Lost Communication with Steering Angle Sensor Module on Bus B Invalid Serial Data |
| U1827 72 | Lost Communication with Steering Angle Sensor Module on Bus B Alive Counter Incorrect/Not Updated |
| U1827 74 | Lost Communication with Steering Angle Sensor Module on Bus B Value of Signal Protection Calculation Incorrect |
| U1827 7F | Lost Communication with Steering Angle Sensor Module on Bus B Erratic |
| U1829 00 | Lost Communication with Gateway A on Bus B |
| U182A 00 | Lost Communication with Battery Energy Control Module on Bus B |
| U1842 00 | Electronic Brake Control Module Lost Communication with Engine Control Module on Bus B |
| U1843 00 | Electronic Brake Control Module Lost Communication with Hybrid Engine Control Module on Bus B |
| U1862 00 | Battery Energy Control Module Lost Communication with Communications Gateway Module |
| U1863 00 | Starter/Generator Control Module Lost Communication with Body Control Module |
| U1865 00 | Fuel Operated Heater Lost Communication with Engine Control Module |
| U1866 00 | Battery Energy Control Module Lost Communication with Body Control Module |
| U186A 00 | Lost Communication with Transfer Case Control Module |
| U186B 00 | Lost Communication with TCM |
| U1875 00 | Drive Motor A Control Module Lost Communication with Battery Energy Control Module |
| U1876 00 | Drive Motor A Control Module Lost Communication with Engine Control Module (ECM)/Powertrain Control Module (PCM) |
| U1878 00 | Drive Motor B Control Module Lost Communication with Battery Energy Control Module |
| U1879 00 | Drive Motor B Control Module Lost Communication with Engine Control Module (ECM)/Powertrain Control Module (PCM) |
| U1885 00 | Battery Energy Control Module Lost Communication with HP2 Powertrain Control Module |
| U1886 00 | Battery Energy Control Module Lost Communication with Engine Control Module (ECM) |
| U1888 00 | Hybrid Powertrain Control Module Lost Communication With Starter/Generator Control Module |
| U1897 00 | Starter/Generator Control Module Lost Communication with Battery Energy Control Module |
| U1899 00 | Starter/Generator Control Module Lost Communication with Engine Control Module/Powertrain Control Module |
| U189A 00 | DC to DC Converter Control Module A Lost Communication with HP2 Powertrain Control Module |
| U2099 00 | High Speed Communication Enable Circuit |
| U209A 00 | High Speed Communication Enable Circuit Low |
| U209D 00 | Battery Energy Control Module High Speed Communication Enable Circuit High |
| U2100 00 | Controller Area Network (CAN) Bus Communication |
| U2100 47 | Controller Area Network (CAN) Bus Communication |
| U2102 00 | More Controllers On Bus Than Programmed |
| U2103 00 | Fewer Controllers On Bus Than Programmed |
| U2105 00 | Lost Communication with Engine Control Module |
| U2106 00 | Lost Communication with Transmission Control Module |
| U2107 00 | Lost Communication with Body Control Module |
| U2108 00 | Lost Communication with ABS/TCS Control System |
| U2109 00 | Lost Communication with Powertrain Control Module |
| U2110 00 | Lost Communication with Chassis Multiple Control System |
| U2111 00 | Lost Communication with Steering Control Module |
| U2112 00 | Lost Communication with Electronic Suspension Control (ESC) |
| U2113 00 | Lost Communication with Sensing and Diagnostic Module (SDM) |
| U2114 00 | Lost Communication with PPS or CPS |
| U2115 00 | Lost Communication with Restraints Control System |
| U2116 00 | Lost Communication with Instrument Cluster |
| U2117 00 | Lost Communication with Info Display |
| U2118 00 | Lost Communication with Head Up Display (HUD) |
| U2119 00 | Lost Communication with Daytime Running Lamps Control Module |
| U2120 00 | Lost Communication with Automatic Headlamp Leveling Control Module |
| U2121 00 | Lost Communication with Radio Display |
| U2122 00 | Lost Communication with Radio |
| U2123 00 | Lost Communication with Compact Disc Changer (CDX) |
| U2124 00 | Lost Communication with Audio Amplifier |
| U2125 00 | Lost Communication with Telematic Unit |
| U2126 00 | Lost Communication with Mobile Communications Control System |
| U2127 00 | Lost Communication with Front HVAC Control Module |
| U2128 00 | Lost Communication with Rear HVAC Control Module |
| U2129 00 | Lost Communication with Remote Function Actuator (RFA) |
| U2130 00 | Lost Communication with Driver Door Module (DDM) |
| U2131 00 | Lost Communication with Driver Seat Module (DSM) |
| U2132 00 | Lost Communication with Passenger Door Module (PDM) |
| U2133 00 | Lost Communication with Passenger Seat Module (PSM) |
| U2134 00 | Lost Communication with Rear Door Module (RDM) |
| U2135 00 | Lost Communication with Rear Integration Module (RIM) |
| U2136 00 | Lost Communication with Memory Mirror Module (MMM) |
| U2137 00 | Lost Communication with Vehicle Theft Deterrent (VTD) |
| U2138 00 | Lost Communication with Column Locking Module (CLM) |
| U2139 00 | Lost Communication with Column Integration Module (CIM) |
| U2140 00 | Lost Communication with Underhood Electrical Center (UEC) |
| U2141 00 | Lost Communication with Rear Electrical Center |
| U2142 00 | Lost Communication with Yaw Rate Sensor (YRS) |
| U2143 00 | Lost Communication with Steering Angle Sensor (SAS) |
| U2144 00 | Lost Communication with Distance Sensing Cruise Control Module |
| U2145 00 | Lost Communication with Parking Assistance System (PAS) |
| U2146 00 | Lost Communication with Shift Lever Module (SLM) |
| U2147 00 | Lost Communication with Auxiliary Heater System (AHS) |
| U2148 00 | Lost Communication with Sun Roof Module (SRM) |
| U2149 00 | Lost Communication with Tire Pressure Monitor (TPM) System |
| U2150 00 | Navigation Electronic Control Unit (ECU) Gateway Communications |
| U2151 00 | Navigation Electronic Control Unit (ECU) Communications |
| U2152 00 | Navigation Bus Request Line Circuit Low |
| U2153 00 | Navigation Electronic Control Unit (ECU) - VICS Communication Circuit |
| U2160 00 | Lost Communication with Steering Control System Sensor |
| U2161 00 | Lost Communication with Dash Integration Module (DIM) |
| U2162 00 | Lost Communication with Instrument Panel integration Module (IPM) |
| U2163 00 | Lost Communication with Left Rear Door Module (LRDM) |
| U2164 00 | Lost Communication with Right Rear Door Module (RRDM) |
| U2165 00 | Lost Communication with Driver Door Switch (DDS) |
| U2166 00 | Lost Communication with Driver Position Module (DPM) |
| U2167 00 | Lost Communication with Remote Control Door Lock Receiver (RCDLR) |
| U2168 00 | Lost Communication with Side Object Detection (SOD) Module - Left |
| U2169 00 | Lost Communication with Side Object Detection (SOD) Module - Right |
| U2170 00 | Lost Communication with Four Wheel Drive (4WD) Clutch |
| U2171 00 | Lost Communication with Rear Seat Entertainment (RSE) |
| U2172 00 | Lost Communication with Digital Radio Receiver (DRR) |
| U2173 00 | Lost Communication with Passive Entry and Passive Start System |
| U2174 00 | Lost Communication with Parking Heater System |
| U2175 00 | Lost Communication with Special Vehicle Module |
| U2176 00 | Lost Communication with Power Take Off (PTO) Control Module |
| U2177 00 | Lost Communication with Cruise Control Module |
| U2178 00 | Lost Communication with Trailer Interface Module |
| U2179 00 | Lost Communication with Television Module |
| U2180 00 | Lost Communication with Folding Top Control Module |
| U2181 00 | Lost Communication with Moveable Roof Module |