ONSTAR DTCS
ONSTAR DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B1401 | OnStar Control Unit Internal Error (CPU Error) |
| DTC B1402 | Onstar Control Unit Internal Error (EEPROM Error) |
| DTC B1403 | GPS Receiver Error |
| DTC B1404 | Telephone Module Error |
| DTC B1400 | Communication Bus Line Error (BUS-OFF) |
| DTC B1405 | OnStar Control Unit Lost Communication with Driver's MPCS Unit (Door Switch Message) |
| DTC B1406 | OnStar Control Unit Lost Communication with Driver's MPCS Unit (Door Look Switch Message) |
| DTC B1407 | OnStar Control Unit Lost Communication with Driver's MPCS Unit (ASLOCKSW Message) |
| DTC B1408 | OnStar Control Unit Lost Communication with Gauge Control Module (VSP/NE Message) |
| DTC B1425 | OnStar Control Unit Lost Communication with SRS Unit (collision detection system line) |
| DTC B1426 | OnStar Switches Circuit Malfunction |
| DTC B1427 | Microphone Circuit Malfunction |
| DTC B1428 | GPS Antenna Circuit Malfunction |
| DTC B1433 | Cellular PHONE Antenna Circuit Malfunction |