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.
2001 Cadillac Eldorado ESCFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1000 | Control Module Detects Internal Fault |
| DTC B1007 | Control Module EEPROM Write Error |
| DTC B1009 | Control Module Checksum Error |
| DTC B1552 | Loss Of Keep Alive Memory |
| DTC B1556 | Instrument Panel Cluster EEPROM Odometer Error |
| DTC B1558 | Instrument Panel Cluster EEPROM Checksum Error |
| DTC B1656 | Instrument Panel Cluster EEPROM Write Error |
| DTC B1658 | Body Control Module Checksum Error |
| DTC B1972 | Body Control Module B+ Voltage Short To Ground |
| DTC B1973 | Body Control Module B+ Voltage Short To Voltage |
| DTC B2550 | Storage Mode Entered |
| DTC U1000 & U1255 | Class 2 Communication Malfunction |
| DTC U1001-U1254 | Loss Of XXX Communications |
| DTC U1300 | Class 2 Serial Data Circuit Low Voltage |
| DTC U1301 | Class 2 Serial Data Circuit High Voltage |
| DTC U1500 | OnStar® Serial Data Return Circuit Failure |
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.