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 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B1000 | ECU Malfunction In Body Control System |
| B1004 | Control Module Keep Alive Memory Malfunction |
| B1007 | EEPROM Write Error |
| B1009 | EEPROM Checksum Error |
| B1013 | Calibration ROM Checksum Error |
| B1334 | Device Power #2 (Low Current #2) Circuit Open |
| B1339 | Device Power #3 Circuit Open |
| B1354 | Device Ground #2 (Chassis Ground #2) Circuit Open |
| B1422 | Device Power Moding Malfunction |
| B1477 | Retained Accessory Power Circuit Low |
| B1478 | Retained Accessory Power Circuit High |
| B1482 | Inadvertent Power Short To Ground |
| B2533 | Front Fog Lights Control Circuit High |
| B2552 | Back-Up Lights Control Circuit Low |
| B2553 | Back-Up Lights Control Circuit High |
| B2559 | Courtesy Lights Ground Open |
| B2577 | Headlight Control Circuit Low |
| B2578 | Headlight Control Circuit High |
| B2587 | Parking Light Control Circuit Low |
| B2588 | Parking Light Control Circuit High |
| B2603 | Daytime Running Lights Control #1 Circuit High |
| B2608 | Daytime Running Lights Control #2 Circuit High |
| B2617 | Passenger Compartment Dimming #2 Circuit Low |
| B2618 | Passenger Compartment Dimming #2 Circuit High |
| B2647 | Ambient Light Sensor Circuit Low |
| B2648 | Ambient Light Sensor Circuit High |
| B2747 | Traction Control Switch Circuit Low |
| B2818 | Low Tire Pressure System Reset Circuit Low |
| B3267 | Deck Lid Relay Output Open/Short To Ground |
| B3268 | Deck Lid Relay Output Short To Voltage |
| U1000 | Class 2 Communication Malfunction |
| U1001-U1254 | Loss Of XXX Communications |
| U1255 | Class 2 Communication Malfunction |
| U1300 | Class 2 Circuit (Short To Ground) |
| U1301 | Class 2 Circuit (Short To Voltage) |
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.
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