Communication Codes (U Codes)
DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| U1009 | SCP (J1850) Bus Invalid or Missing Data for Engine Torque | ABS/TC Module or Stability Assist Module | REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE article. |
| U1027 | SCP (J1850) Bus Invalid or Missing Data for Engine RPM | Instrument Cluster | REFER to INFORMATION GAUGES AND WARNING DEVICES . |
| U1027 | SCP (J1850) Bus Invalid or Missing Data for Engine RPM | ABS/TC Module or Stability Assist Module | REFER to BRAKE SYSTEM . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | Instrument Cluster | REFER to INFORMATION GAUGES AND WARNING DEVICES . |
| U1041 | SCP (J1850) Bus Invalid or Missing Data for Vehicle Speed | Tire Pressure Monitoring System Module | REFER to SUSPENSION SYSTEM . |
| U1059 | SCP (J1850) Bus Invalid or Missing Data for Transmission/Transaxle PRNDL | ABS/TC Module or Stability Assist Module | REFER to AUTOMATIC TRANSMISSION - 5R55S . |
| U1059 | SCP (J1850) Bus Invalid or Missing Data for Transmission/Transaxle PRNDL | Instrument Cluster | REFER to AUTOMATIC TRANSMISSION - 5R55S . |
| U1062 | SCP (J1850) Bus Invalid or Missing Data for Engine RPM | VAPS Module | REFER to SUSPENSION SYSTEM . |
| U1073 | SCP (J1850) Bus Invalid or Missing Data for Engine Coolant | ABS/TC Module or Stability Assist Module | REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE article. |
| U1073 | SCP (J1850) Invalid or Missing Data for Engine Coolant | Instrument Cluster | REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE article. |
| U1123 | SCP (J1850) Invalid or Missing Data for Odometer | Instrument Cluster | REFER to INFORMATION GAUGES AND WARNING DEVICES . |
| U1249 | SCP (J1850) Invalid Data for Time/Date | Instrument Cluster | REFER to INFORMATION GAUGES AND WARNING DEVICES . |
| U1262 | SCP (J1850) Bus Communication Bus Fault | ABS/TC Module or Stability Assist Module | REFER to SUSPENSION SYSTEM . |
| U1262 | SCP (J1850) Communication Bus Fault | Instrument Cluster | REFER to COMMUNICATIONS NETWORK . |
| U1262 | SCP (J1850) Bus Communication Bus Fault | Tire Pressure Monitoring System Module | REFER to COMMUNICATIONS NETWORK . |
| U1900 | CAN Communication Bus Fault-Receive Error | ABS/TC Module or Stability Assist Module | REFER to BRAKE SYSTEM . |
| U1900 | CAN Communication Bus Fault Module | 4WD Control | REFER to FOUR-WHEEL DRIVE SYSTEMS . |
| U1901 | CAN Network No. 2 Communication Bus Fault-Receive Error | ABS/TC Module or Stability Assist Module | REFER to BRAKE SYSTEM . |
| U1950 | UBP Communication Bus Fault | 4WD Control Module | REFER to COMMUNICATIONS NETWORK . |
| U1950 | UBP Communication Bus Fault | DSM | REFER to COMMUNICATIONS NETWORK . |
| U1950 | UBP Communication Bus Fault | Instrument Cluster | REFER to COMMUNICATIONS NETWORK . |
| U1950 | UBP Communication Bus Fault | Vehicle Security Module | REFER to COMMUNICATIONS NETWORK . |
| U2003 | Audio Compact Disc/Disc Jockey Unit is Not Responding | Navigation System Module | REFER to ENTERTAINMENT SYSTEM . |
| U2005 | Audio Rear Integrated Control Panel Unit is Not Responding | Navigation System Module | REFER to ENTERTAINMENT SYSTEM . |
| U2013 | Compass Module is Not Responding | Instrument Cluster | REFER to COMMUNICATIONS NETWORK . |
| U2023 | External Node Fault DTC | 4WD Control Module | REFER to FOUR-WHEEL DRIVE SYSTEMS . |
| U2024 | Rear Seat Control Not Responding | Navigation System Module | REFER to ENTERTAINMENT SYSTEM . |
| U2025 | Satellite Module Not Responding | Navigation System Module | REFER to ENTERTAINMENT SYSTEM . |
| U2026 | Family Entertainment Not Responding | Navigation System Module | REFER to ENTERTAINMENT SYSTEM . |
| U2226 | UBP Invalid Node 10 | 4WD Control Module | REFER to COMMUNICATIONS NETWORK . |
| U2226 | UBP Invalid Node 10 | Vehicle Security Module | REFER to COMMUNICATIONS NETWORK . |
| U2235 | UBP Invalid Data From Node ID $19 | Instrument Cluster | REFER to COMMUNICATIONS NETWORK . |
| U2306 | UBP Invalid Node 60 | 4WD Control Module | REFER to COMMUNICATIONS NETWORK . |
| U2306 | UBP Invalid Node 60 | DSM | REFER to COMMUNICATIONS NETWORK . |
| U2362 | UBP Invalid Data From Node ID $98 | Instrument Cluster | REFER to COMMUNICATIONS NETWORK . |
| U2471 | Unexpected PRNDL State | DSM | REFER to COMMUNICATIONS NETWORK . |