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.
2000 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | ||
|---|---|---|---|
| B1000 | ECU Malfunction | ||
| B1004 | Keep Alive Memory (KAM) | ||
| B1339 | Device Power No. 3 Circuit Open | ||
| B1349 | Device Ground No. 1 Circuit Open | ||
| B1440 | Power Mode Master Input Circuit Mismatch | ||
| B1447 | Retained Accessory Power Circuit Low | ||
| B1478 | Retained Accessory Power Circuit High | ||
| B1482 | Battery Rundown Protection Circuit Low | ||
| B1483 | Battery Rundown Protection Circuit High | ||
| B1507 | High Power Control Circuit Low | ||
| B1508 | High Power Control Circuit High | ||
| U1000 (1) | Class 2 Serial Data Link Malfunction | ||
| U1300 | Class 2 Data Link Shorted To Ground | ||
| U1301 | Class 2 Data Link Shorted To Power | ||
| U1305 | Class 2 Data Link Shorted To Ground/Power | ||
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Factory Service Tools
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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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