For 1990-2009 cars

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.

DTC | DTC Descriptor
--- | ---
U0001 00 | High Speed CAN Bus Malfunction
U0002 00 | High Speed CAN Bus
U0010 00 | CAN BUS Reset Counter Overrun
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
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 Electrical PTO Control Module
U0121 00 | Lost Communication with Electronic Brake Control Module (EBCM)
U0122 00 | Lost Communication with Vehicle Stability Control Module
U0123 00 | Lost Communication with Yaw Rate 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 Ride Level 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)
U0158 00 | Lost Communication with Head Up Display
U0159 00 | Lost Communication with Park Assist Module (RPA)
U0160 00 | Lost Communication with Audible Alert Control Module
U0164 00 | Lost Communication with HVAC Control Module
U0165 00 | Loss of Communication with HVAC Control Module - Rear
U0168 00 | Lost Communication with Vehicle Security Control Module
U0170 00 | Lost Communication with Restraints System Sensor A (PPS)
U0172 00 | Lost Communication with Rollover Sensor
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 Door Control Module A (DDM)
U0200 00 | Lost Communication with Door Control Module B (PDM)
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
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
U180F | Control Module Communication 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
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
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
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 01 | Inter-Device Dedicated Bus 1 Short to Battery
U1500 02 | Inter-Device Dedicated Bus 1 Short to Ground
U1511 00 | Inter-device Dedicated Bus Lost Communication with Device 1
U1512 00 | Inter-device Dedicated Bus Lost Communication with Device 2
U1513 00 | LIN Bus 1 Lost Communication with Device 3
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 Active Front Steering (AFS) Control Module on Bus B
U1823 00 | Lost Communications with Antilock Brake System (ABS) Control Module on Bus B
U1824 00 | Lost Communications with Ride Level Control Module
U1825 00 | Lost Communications with SCM (CAN)
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
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 | Lost Communication with Battery Pack
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 | Fewer 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