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.
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HOMESERVICE MANUALSHONDA2009ACCORD EX, 4D SEDAN, 2.4 CP2, STANDARDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEX (4-CYL)MULTIPLEX INTERGRATED CONTROL DTCS
2009 Honda Accord EX, 4D Sedan, 2.4 CP2, Standard
Multiplex INTERGRATED Control DTCS
2009 Honda Accord EX, 4D Sedan, 2.4 CP2, StandardSECTION Multiplex INTERGRATED Control DTCS
Driver's MICU
DRIVER'S MICU DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description | DTC Type |
|---|---|---|
| B10A2 | Driver's MICU (EEPROM) error | Internal error |
| B10CF | Left daytime running lights circuit malfunction | Signal error |
| B1036 | Driver's MICU IG1 line input error | Signal error |
| B1077 | Wiper (AS) signal error | Signal error |
| B1275 | Headlight switch OFF position circuit malfunction | Signal error |
| B1276 | Headlight switch parking (PARKING LIGHT) position circuit malfunction | Signal error |
| B1277 | Headlight switch AUTO position circuit malfunction | Signal error |
| B1278 | Headlight switch ON position circuit malfunction | Signal error |
| B1279 | Dimmer switch circuit malfunction | Signal error |
| B1280 | Turn signal circuit malfunction | Signal error |
| B1281 | Front wiper switch MIST position circuit malfunction | Signal error |
| B1282 | Front wiper switch INT position circuit malfunction | Signal error |
| B1283 | Front wiper switch LOW position circuit malfunction | Signal error |
| B1284 | Front wiper switch HIGH position circuit malfunction | Signal error |
| U0155 | Driver's MICU lost communication with gauge control module | Loss of communication |
| U0199 | Driver's MICU lost communication with door multiplex control unit | Loss of communication |
| U1280 | Communication bus line error (BUS-OFF) | Loss of communication |
| U1283 | Driver's MICU lost communication with passenger's MICU | Loss of communication |
Passenger's MICU
PASSENGER'S MICU DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description | DTC Type |
|---|---|---|
| B11A2 | Passenger's MICU internal (EEPROM) error | Internal error |
| B11C7 | Passenger's MICU IG1 line input error | Signal error |
| B11CF | Right daytime running lights circuit malfunction | Signal error |
| B1575 | Auto lighting sensor circuit malfunction | Signal error |
| U0155 | Passenger's MICU lost communication with gauge control module | Loss of communication |
| U1280 | Communication bus line error (BUS-OFF) | Loss of communication |
| U1282 | Passenger's MICU lost communication with driver's MICU | Loss of communication |
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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.