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.
2021 Honda Insight LXFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
| DTC | Description | DTC type |
|---|---|---|
| B1002 | BCM internal error (EEPROM error) | Internal error |
| B1003 | BCM Update error | Internal error |
| B1036 | IG1 Power supply Circuit Malfunction | Signal error |
| B1038 | IMMOBILIZER F-CAN Authentication ID Not Received | Signal error |
| B1039 | IMMOBILIZER F-CAN Authentication ID Unmatch | Signal error |
| B1040 | BCM lost communication with Front wiper | Loss of communication |
| B1041 | Front Wiper motor malfunction | Signal error |
| B1042 | Front Wiper security line error | Signal error |
| B1043 | Front Wiper unit internal error (EEPROM error) | Signal error |
| B1077 | Front wiper auto stop switch signal error | Signal error |
| B1275 | Head light OFF position Circuit Malfunction | Signal error |
| B1276 | Headlight Switch Parking (Small) Position Circuit Malfunction | Signal error |
| B1277 | Head light AUTO position Circuit Malfunction | Signal error |
| B1278 | Head light ON position Circuit Malfunction | Signal error |
| B1279 | Dimmer switch Circuit Malfunction | Signal error |
| B1280 | Turn signal switch Circuit Malfunction | Signal error |
| DTC | Description | DTC type |
|---|---|---|
| B1281 | Front wiper MIST position Circuit Malfunction | Signal error |
| B1282 | Front wiper INT (AUTO) position Circuit Malfunction | Signal error |
| B1283 | Front wiper LOW position Circuit Malfunction | Signal error |
| B1284 | Front wiper HIGH position Circuit Malfunction | Signal error |
| U0073 | F-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U0100 | BCM lost communication with ECM/PCM | Loss of communication |
| U0122 | BCM lost communication with VSA/ABS | Loss of communication |
| U1280 | B-CAN communication bus line error (BUS-OFF) | Loss of communication |
| U128D | BCM lost communication with gauge control module | Loss of communication |
| U1291 | BCM lost communication with relay control module | Loss of communication |
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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