Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Cadillac CTS AutomaticFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1000 | Internal Fault |
| DTC B1004 | KAM Has Been Reset |
| DTC B1007 | EEPROM Error |
| DTC B1009 | EEPROM Checksum Error |
| DTC B1013 | FLASH Calibration Checksum Reference Value |
| DTC B1014 | FLASH Application Checksum Reference Value |
| DTC B1372 | IGN 1 Voltage Circuit Is Low |
| DTC B1382 | Accessory Voltage Circuit Is Low |
| DTC B1390 | 2 Battery Positive Voltages Differ |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.