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.
1997 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DTCS
| DTC | Description |
|---|---|
| B0603 | BCM INTERNAL MEMORY MALFUNCTION (WRITE ERROR) |
| B0605 | BCM INTERNAL MEMORY MALFUNCTION (CHECKSUM ERROR) |
| B0608 | BCM POWER MODING ERROR |
| B0702 | RAP RELAY CIRCUIT (SHORT TO GROUND OR OPEN) |
| B0703 | RAP RELAY CIRCUIT (SHORT TO VOLTAGE) |
| B0807 | BATTERY FOR DOOR LOCK CIRCUIT (OPEN) |
| B0812 | COURTESY LIGHTS BATTERY FEED CIRCUIT (OPEN) |
| B0823 | DOORS G201 CIRCUIT (OPEN) |
| B0828 | THEATER DIMMING GROUND CIRCUIT (OPEN) |
| B1802 | COURTESY LIGHTS CIRCUIT (SHORT TO GROUND) |
| B2202 | DRIVER'S DOOR UNLOCK CIRCUIT (SHORT TO GROUND OR OPEN) |
| B2203 | DRIVER'S DOOR UNLOCK CIRCUIT (SHORT TO VOLTAGE) |
| B2403 | FOGLIGHT SWITCH CIRCUIT (SHORT TO VOLTAGE) |
| B2417 | DRL CONTROL MODULE CIRCUIT (SHORT TO GROUND OR OPEN) |
| B2418 | DRL CONTROL MODULE CIRCUIT (SHORT TO VOLTAGE) |
| B2452 | THEATER DIMMING NO. 1 CIRCUIT (SHORT TO GROUND OR OPEN) |
| B2453 | THEATER DIMMING NO. 1 CIRCUIT (SHORT TO VOLTAGE) |
| B2457 | THEATER DIMMING NO. 2 CIRCUIT (SHORT TO GROUND OR OPEN) |
| B2458 | THEATER DIMMING NO. 2 CIRCUIT (SHORT TO VOLTAGE) |
| B2528 | HORN RELAY CIRCUIT (SHORT TO VOLTAGE) |
| B2721 | PASS-KEY(R) DETECTION CIRCUIT (OUT OF RANGE) |
| B2722 | PASS-KEY(R) DETECTION CIRCUIT (SHORT TO GROUND) |
| B2723 | PASS-KEY(R) DETECTION CIRCUIT (SHORT TO VOLTAGE OR OPEN) |
| B2735 | PASS-KEY(R) PROGRAMMING MODE ACTIVE |
| B2739 | KEY-IN-IGNITION FAULT |
| B2802 | RFA LINK CIRCUIT (SHORT TO GROUND) |
| B2803 | RFA LINK CIRCUIT (SHORT TO VOLTAGE) |
| B2805 | RFA PROGRAMMING/DIAGNOSTIC MODE MESSAGE NOT RECEIVED |
| B2806 | RFA LINK PARITY ERROR |
| U1016 | PCM CLASS 2 SOURCE ID 10 |
| U1040 | EBTCM CLASS 2 SOURCE ID 28 |
| U1064 | LOSS OF BCM SOURCE ID 40 |
| U1096 | INSTRUMENT PANEL CLASS 2 SOURCE ID 60 |
| 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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