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 MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 167 (HEATING/AIR CONDITIONING)DTC TROUBLESHOOTING INDEX
2002 Honda Civic Si
DTC Troubleshooting Index
2002 Honda Civic SiSECTION DTC Troubleshooting Index
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
DTC TROUBLESHOOTING INDEX
| DTC | Detection Item or Symptom | ECU | DTC type |
|---|---|---|---|
| DTC B1200: COMMUNICATION BUS LINE ERROR | Communication bus line error | A/C control panel | Loss of communication |
| B1202 | A/C control panel internal error | A/C control panel | Internal error |
| B1205 | A/C control panel lost communication with gauge control module (VSP/NE message) | A/C control panel | Loss of communication |
| B1206 | A/C control panel lost communication with gauge control module (ENGTEMP message) | A/C control panel | Loss of communication |
| B1207 | A/C control panel lost communication with gauge control module (ILLUMI message) | A/C control panel | Loss of communication |
| B1221 | An open in the rear mode control motor circuit | A/C control panel | Signal error |
| B1223 | A problem in the rear blower motor circuit | A/C control panel | Signal error |
| B1231 | An open in the evaporator temperature sensor circuit | A/C control panel | Signal error |
| B1232 | A short in the evaporator temperature sensor circuit | A/C control panel | Signal error |
| B1233 | An open in the air mix control motor circuit | A/C control panel | Signal error |
| B1234 | A short in the air mix control motor circuit | A/C control panel | Signal error |
| B1235 | A problem in the air mix control linkage, door, or motor | A/C control panel | Signal error |
| B1239 | An open or short in the mode control motor circuit | A/C control panel | Signal error |
| B1240 | A problem in the mode control linkage, doors, or motor | A/C control panel | Signal error |
| B1241 | A problem in the blower motor circuit | A/C control panel | Signal error |
| B1244 | An open in the rear air mix control motor circuit | A/C control panel | Signal error |
| B1245 | A short in the rear air mix control motor circuit | A/C control panel | Signal error |
| B1246 | A problem in the rear air mix control linkage, door, or motor | A/C control panel | Signal error |
| B1247 | An open or short in the rear mode control motor circuit | A/C control panel | Signal error |
| B1248 | A problem in the rear mode control linkage, doors, or motor | A/C control panel | Signal error |
RENDER: 1.0x
NO RELATED
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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.