DTC Charts
NOTE:
Network DTCs (U-codes) are often a result of intermittent concerns such as faulty wiring or low battery voltage occurrences. Additionally, vehicle service procedures such as module reprogramming will often set network DTCs. Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Test the vehicle battery, refer to BATTERY, MOUNTING AND CABLES
article.
NOTE:
DTC U1900 will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module.
COMMUNICATION NETWORK DTC CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| U0002 | High Speed CAN Communication Bus Performance | IC | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0020 | Low Speed CAN Communication Bus Performance | IC | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0073 | Control Module Communication Bus A Off | ABS module | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0073 | Control Module Communication Bus A Off | Headlamp control module (HCM) | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0073 | Control Module Communication Bus A Off | HVAC module | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0100 | Lost Communication With ECM/PCM | HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test A . |
| U0100 | Lost Communication With ECM/PCM | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test A . |
| U0100 | Lost Communication With ECM/PCM | Occupant classification system module (OCSM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test A . |
| U0100 | Lost Communication With ECM/PCM | Restraints control module (RCM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test A . |
| U0100 | Lost Communication With ECM/PCM | 4X4 control module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test A . |
| U0102 | Lost Communication With Transfer Case Control Module (4x4CM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test D . |
| U0115 | Lost Communication With ECM/PCM - Secondary (SPCM) | ABS module | DISREGARD this DTC as it may have been set during module reprogramming. |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test B . |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | 4X4 control module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test B . |
| U0126 | Lost Communication With Steering Angle Sensor Module | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test G . |
| U0126 | Lost Communication With Steering Angle Sensor Module | HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, REFER to EXTERIOR LIGHTING article. |
| U0140 | Lost Communication With Body Control Module (GEM) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0140 | Lost Communication With Body Control Module (GEM) | Driver seat module (DSM) | Go to Pinpoint Test I . |
| U0140 | Lost Communication With Body Control Module (GEM) | HVAC module | Go to Pinpoint Test I . |
| U0140 | Lost Communication With Body Control Module (GEM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test I . |
| U0140 | Lost Communication With Body Control Module (GEM) | Liftgate/trunk module (LTM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test I . |
| U0140 | Lost Communication With Body Control Module (GEM) | Parking aid module (PAM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test I . |
| U0140 | Lost Communication With Body Control Module (GEM) | Rear entertainment module (RETM) | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0151 | Lost Communication With Restraints Control Module | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test C . |
| U0151 | Lost Communication With Restraints Control Module | OCSM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test C . |
| U0154 | Lost Communication With Restraints Occupant Classification System Module (OCS) | RCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test E . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | DSM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | DSP module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | HVAC module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | LTM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | PAM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | SJB | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | Steering angle sensor module (SASM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | 4X4 control module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test H . |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | ACM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test Q . |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test Q . |
| U0164 | Lost Communication With HVAC Control Module (EATC) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test J . |
| U0184 | Lost Communication With Radio (ACM) | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0184 | Lost Communication With Radio (ACM) | DSP module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0184 | Lost Communication With Radio (ACM) | RETM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0184 | Lost Communication With Radio (ACM) | SDARS | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS) | RETM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | DSP module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0197 | Lost Communication With Telephone Control Module | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0197 | Lost Communication With Telephone Control Module | DSP module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0197 | Lost Communication With Telephone Control Module | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0208 | Lost Communication With Seat Control Module (DSM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test O . |
| U0230 | Lost Communication With Rear Gate Module (LTM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test R . |
| U0238 | Lost Communication With Digital Audio Control Module "D" (DSP) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0241 | Lost Communication With Headlamp Control Module (HCM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test F . |
| U0246 | Lost Communication With Seat Control Module (DCSM) | HVAC module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, go to Pinpoint Test P . |
| U0249 | Lost Communication With Entertainment Control Module - Rear "B" (RCU) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0249 | Lost Communication With Entertainment Control Module - Rear "B" (RCU) | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0255 | Lost Communication With Front Controls Interface Module | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0256 | Lost Communication With Front Display Interface Module | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U0401 | Invalid Data Received from ECM/PCM A | RCM | RETRIEVE and FOLLOW DTCs from the PCM. |
| U0401 | Invalid Data Received from ECM/PCM A | 4X4 control module | RETRIEVE and FOLLOW DTCs from the PCM. |
| U0415 | Invalid Data Received from Anti-Lock Brake System (ABS) Control Module | 4X4 control module | RETRIEVE and FOLLOW DTCs from the ABS module. |
| U0455 | Invalid Data Received From Restraints Occupant Classification System Module | RCM | RETRIEVE and FOLLOW DTCs from the OCSM. |
| U1900 | CAN Communication Bus Fault-Receive Error | DSM | Go to Symptom Chart for module that failed network test. |
| U1901 | CAN Network #2 Communication Bus Fault - Receive Error | ABS | REFER to VEHICLE DYNAMIC SYSTEMS article. |
| U2013 | Compass Module is not Responding | IC | REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article. |
| U2023 | Fault Received From External Node | IC | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES article for a list of all DTCs. |
| U2023 | Fault Received From External Node | OCSM | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES article for a list of all DTCs. |
| U2196 | Invalid 'Engine RPM' Data | HCM | RETRIEVE and FOLLOW DTCs from the PCM. |
| U2471 | Unexpected PRNDL State | HCM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article. |
| U2471 | Unexpected PRNDL State | LTM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article. |
| U2472 | Unexpected Ignition State | HCM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article. |
| U2472 | Unexpected Ignition State | IC | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article. |
| U2472 | Unexpected Ignition State | LTM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article. |
| U2472 | Unexpected Ignition State | SJB | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article. |
| U2473 | Unexpected Vehicle Speed (VSS) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U2473 | Unexpected Vehicle Speed (VSS) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U2473 | Unexpected Vehicle Speed (VSS) | LTM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to BODY CLOSURES article. |
| U2473 | Unexpected Vehicle Speed (VSS) | SJB | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article. |
| U2510 | CAN - Invalid Data for Vehicle Security | IC | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| U2511 | CAN - Data Mis-Match (Receive Data Does Not Match Expected) | IC | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |