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.
1999 Buick Regal LSFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B0608 | BCM POWER MODING ERROR |
| B1003 | RFA PROGRAMMING/ DIAGNOSTIC MODE MESSAGE NOT RECEIVED |
| B1007 | BCM INTERNAL MEMORY MALFUNCTION (WRITE ERROR) |
| B1009 | BCM INTERNAL MEMORY MALFUNCTION (CHECKSUM ERROR) |
| B1015 | VIN INFORMATION ERROR |
| B1339 | BATTERY FOR DOOR LOCK CIRCUIT (OPEN) |
| B1344 | COURTESY LIGHTS BATTERY FEED CIRCUIT (OPEN) |
| B1349 | DOOR LOCK ACTUATOR GROUND FEED CIRCUIT (OPEN) |
| B1477 | RAP RELAY CIRCUIT (SHORT TO GROUND OR OPEN) |
| B1478 | RAP RELAY CIRCUIT (SHORT TO VOLTAGE) |
| B1482 | COURTESY LIGHTS CIRCUIT (SHORT TO GROUND) |
| B2533 | FOGLIGHT SWITCH CIRCUIT (SHORT TO VOLTAGE) |
| B2552 | BACKUP LAMP CIRCUIT LOW |
| B2553 | BACKUP LAMP CIRCUIT HIGH |
| B2559 | THEATER DIMMING GROUND CIRCUIT (OPEN) |
| B2602 | DRL CONTROL MODULE CIRCUIT (SHORT TO GROUND OR OPEN) |
| B2603 | DRL CONTROL MODULE CIRCUIT (SHORT TO VOLTAGE) |
| B2612 | PASSENGER COMPARTMENT DIMMING NO. 1 CIRCUIT LOW |
| B2613 | DIM POTENTIOMETER CIRCUIT HIGH |
| B2618 | PASSENGER COMPARTMENT DIMMING NO. 2 CIRCUIT HIGH |
| B2747 | PERFORMANCE SHIFT SWITCH CIRCUIT (SHORT TO GROUND OR OPEN) |
| B2753 | HORN RELAY CIRCUIT (SHORT TO VOLTAGE) |
| B2818 | LOW TIRE PRESSURE SYSTEM RESET CIRCUIT LOW |
| B2957 | PASS-Key® II DETECTION CIRCUIT (SHORT TO GROUND) |
| B2958 | PASS-Key® II DETECTION CIRCUIT (SHORT TO VOLTAGE OR OPEN) |
| B2960 | PASS-Key® II DETECTION CIRCUIT (OUT OF RANGE) |
| B2961 | KEY-IN-IGNITION FAULT |
| B3031 | PASS-Key® II PROGRAMMING MODE ACTIVE |
| B3102 | RFA LINK CIRCUIT (SHORT TO GROUND) |
| B3103 | RFA LINK CIRCUIT (SHORT TO VOLTAGE) |
| B3106 | RFA LINK PARITY ERROR |
| B3127 | DRIVER'S DOOR UNLOCK CIRCUIT (SHORT TO GROUND OR OPEN) |
| B3128 | DRIVER'S DOOR UNLOCK CIRCUIT (SHORT TO VOLTAGE) |
| B3267 | DECKLID OUTPUT RELAY (SHORT TO GROUND OR OPEN) |
| B3268 | DECKLID OUTPUT RELAY (SHORT TO VOLTAGE) |
| U1016 | LOSS OF CLASS 2 COMMUNICATION WITH PCM |
| U1040 | LOSS OF CLASS 2 COMMUNICATION WITH ABS |
| U1096 | LOSS OF CLASS 2 COMMUNICATION WITH IPC |
| U1255 | LOSS OF CLASS 2 SERIAL DATA FAULT (GENERAL) |
| U1300 | CLASS 2 CIRCUIT (SHORT TO GROUND) |
| U1301 | CLASS 2 CIRCUIT (SHORT TO VOLTAGE) |
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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