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 CateraFACTORY OEM SERVICE PROCEDURE
Body Control Modules DTCS
BODY CONTROL MODULES DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC 055 | AIR BAG SENSING & DIAGNOSTIC MODULE INTERNAL FAULT |
| DTC 055 | VEHICLE THEFT DETERRENT CONTROL MODULE INTERNAL FAULT DETECTED |
| DTC B1552 | LOSS OF BODY CONTROL MODULE KEEP ALIVE MEMORY |
| DTC B1556 | BCM EEPROM WRITE ERROR |
| DTC B1558 | BCM EEPROM CHECKSUM ERROR |
| DTC B1760 | CD CHANGER NOT RESPONDING |
| DTC B1780 | THEFT LOCK ENABLED |
| DTC B1970 | EXTERIOR LIGHT POWER FAULT |
| DTC B1971 | INADVERTENT POWER FAULT |
| DTC B1973 | HIGH POWER CONTROL FAULT |
| DTC B1982 | BATTERY VOLTAGE TOO HIGH - BCM & IRC |
| DTC B1983 | BATTERY VOLTAGE TOO LOW - BCM & IRC |
| DTC B2462 | GPS ANTENNA SIGNAL ERROR |
| DTC B2470 | DAYTIME RUNNING LIGHTS FAULT |
| DTC B2471 | INTERIOR LIGHTS FAULT |
| DTC B2472 | LOW BEAM FAULT |
| DTC B2473 | HIGH BEAM FAULT |
| DTC B2476 | PARKING LIGHTS FAULT - BCM |
| DTC B2476 | ONSTAR® KEYPAD BUTTON ASSEMBLY FAULT |
| DTC B2556 | EEPROM ERROR |
| DTC B2560 | REMOTE KEYLESS ENTRY MESSAGE VALIDATION ERROR |
| DTC U1000 & DTC U1255 | CLASS 2 COMMUNICATION FAULT |
| DTC U1001 To U1254 | LOSS OF XXX COMMUNICATIONS |
| DTC U1300 | CLASS 2 SHORT TO GROUND |
| DTC U1301 | CLASS 2 SHORT TO BATTERY VOLTAGE |
| DTC U2100 | CAN-BUS COMMUNICATION FAULT |
| DTC U2103 | FEWER CONTROLLERS ON BUS THAN PROGRAMMED |
| DTC U2104 | CAN BUS RESET COUNTER OVERRUN |
| DTC U2105, U2106 & U2108 | CAN COMMUNICATION LOST |
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.