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.
2002 Cadillac DeVille BaseFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B100 | Checksum Error |
| DTC B1004 | Running Check Sum Error |
| DTC B1007 | EEPROM Data Mismatch |
| DTC B1009 | EEPROM Error |
| DTC B1013 | Calibration ROM Error |
| DTC B1014 | ROM Error |
| DTC B1390 | Battery Voltage Error |
| DTC B1422 | Malfunction In Ignition Switch Circuits |
| DTC B1556 | Odometer Mileage & EEPROM Disagree |
| DTC B1656 | EEPROM Cell Mismatch |
| DTC B1658 | EEPROM Error |
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.