Communication DTCS (U Codes)
DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| U1009 | SCP (J1850) Invalid or Missing Data for Engine Torque | ABS Module | REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE . |
| U1016 (Late Build Vehicles Only) | SCP Invalid Data (PCM) | Navigation Module | REFER to NAVIGATION SYSTEM . |
| U1026 | SCP (J1850) Invalid or Missing Data for Engine RPM | RWAS Module | REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE . |
| U1027 | Missing or Invalid Throttle Message | Speed Control Module | REFER to SPEED CONTROL . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | EATC Module | REFER to SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | Speed Control Module | REFER to SPEED CONTROL . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | RWAS Module | REFER to VEHICLE DYNAMIC SUSPENSION . |
| U1051 | Missing or Invalid Brake Message | Speed Control Module | REFER to ANTI-LOCK CONTROL - TRACTION CONTROL . |
| U1059 | SCP (J1850) Invalid or Missing Data For Transmission/Transaxle PRNDL | ABS Module | REFER to INSTRUMENT CLUSTER . |
| U1059 | SCP (J1850) Invalid or Missing Data For Transmission/Transaxle PRNDL | Speed Control Module | REFER to INSTRUMENT CLUSTER . |
| U1073 | SCP (J1850) Invalid or Missing Data for Engine Coolant | EATC Module | REFER to INSTRUMENT CLUSTER . |
| U1262 | SCP (J1850) Communication Bus Fault | ABS Module | REFER to MODULE COMMUNICATIONS NETWORK . |
| U1262 | Missing Message Network Faults | Overhead Console Module | REFER to MODULE COMMUNICATIONS NETWORK . |
| U1199 | SCP (J1850) Invalid or Missing Data for External Access (Doors) | RWAS Module | Refer to INTERIOR LIGHTING . |
| U1900 | CAN Communication Bus Failure | ABS Module | REFER to MODULE COMMUNICATIONS NETWORK . |
| U2003 | Audio Compact Disc/Disk Jockey Is Not Responding | ACM | REFER to ENTERTAINMENT SYSTEM - GENERAL INFORMATION . |
| U2003 (Late Build Vehicles Only) | Audio Compact Disc/Disk Jockey Is Not Responding | Navigation Module | REFER to ENTERTAINMENT SYSTEM - GENERAL INFORMATION . |
| U2005 | Audio Rear Integrated Control Panel Unit Is Not Responding | ACM | REFER to ENTERTAINMENT SYSTEM - GENERAL INFORMATION . |
| U2005 (Late Build Vehicles Only) | Audio Rear Integrated Control Panel Unit Is Not Responding | Navigation Module | REFER to ENTERTAINMENT SYSTEM - GENERAL INFORMATION . |
| U2008 | Audio Phone (TCU) Is Not Responding | ACM | REFER to NAVIGATION SYSTEM . |
| U2024 | Audio Redundant Steering Wheel Control Is Not Responding | ACM | REFER to AUDIO UNIT . |
| U2026 (Late Build Vehicles Only) | Family Entertainment System Not Responding | Navigation Module | REFER to ENTERTAINMENT SYSTEM - GENERAL INFORMATION . |