Control Module U Code List
This list includes all Data Communications related U-code DTCs in alphanumeric order with descriptors for all devices. Not all DTCs listed will be applicable to all vehicles.
For symptom byte information, refer to Symptom Byte List .
Control Module U Code List
| DTC | DTC Descriptor |
|---|---|
| U0001 | High Speed CAN Communication Bus Malfunction |
| U0002 | High Speed CAN Communication Bus Performance |
| U0020 | Low Speed CAN Communication Bus Performance |
| U0073 | Control Module Communication Bus Off |
| U0074 | Control Module Communication Bus B Off |
| U0100 | Lost Communication with Engine Control Module |
| U0101 | Lost Communication with Transmission Control Module |
| U0104 | Lost Communication with Cruise Control Module |
| U0105 | Lost Communication with Fuel Injector Control Module |
| U0109 | Lost Communication with Fuel Pump Control Module |
| U0121 | Lost Communication with Electronic Brake Control Module |
| U0122 | Lost Communication with Vehicle Dynamics Control Module |
| U0125 | Lost Communication with Multi-axis Acceleration Sensor Module |
| U0126 | Lost Communication with Steering Wheel Angle Sensor Module |
| U0131 | Lost Communication with Power Steering Control Module |
| U0132 | Lost Communication with Suspension Control Module |
| U0140 | Lost Communication with Body Control Module |
| U0151 | Lost Communication with Inflatable Restraint Sensing and Diagnostic Module |
| U0155 | Lost Communication with Instrument Cluster |
| U0158 | Lost Communication with Head-Up Display |
| U0159 | Lost Communication with Parking Assist Control Module |
| U0160 | Lost Communication with Chime Alarm Control Module |
| U0164 | Lost Communication with HVAC Control Module |
| U0168 | Lost Communication with Keyless Entry Control Module |
| U0170 | Lost Communication with Passenger Presence Detection Sensor Module |
| U0181 | Lost Communication with Headlamp Leveling Control Module |
| U0184 | Lost Communication with Radio |
| U0186 | Lost Communication with Audio Amplifier |
| U0198 | Lost Communication with Telematics Control Module |
| U0214 | Lost Communication with Remote Function Actuation |
| U0241 | Lost Communication with Headlamp Control Module |
| U0249 | Lost Communication with Rear Radio Audio Control Module |
| U1802 | Lost Communication with Fuel Pump Driver Control Module |
| U1814 | Powertrain High Speed Communication Enable Circuit |
| U185D | Fuel Injector Control Module Lost Communication with Engine Control Module |
| U185E | Fuel Injector Control Module Lost Communication with Body Control Module |
| U18A2 | Lost Communication with Fuel Pump Driver Control Module |
| U2099 | High Speed Communication Enable Circuit |
| U2100 | CAN Bus Communication |
| U2101 | CAN Bus Maximum Configuration List |
| U2103 | Fewer Controllers on Bus than Programmed |
| U2400 | Fuel Injector Control Module High Speed CAN Bus Off |
| U2616 | Fuel Pump Driver Control Module Lost Communication with Engine Control Module |