Climate Control System DTC Troubleshooting Index
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Honda Odyssey, 2024 Honda Odyssey, 2023 Honda Odyssey, 2022 Honda Odyssey, and 2021 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
| DTC | Detection Item or Symptom | ECU | DTC Type |
|---|---|---|---|
| B1213 | An open in the rear evaporator temperature sensor circuit | Climate control unit | Signal error |
| B1214 | A short in the rear evaporator temperature sensor circuit | Climate control unit | Signal error |
| B1220 | A short in the recirculation control motor circuit | Climate control unit | Signal error |
| B1221 | An open in the rear mode control motor circuit | Climate control unit | Signal error |
| B1222 | A short in the rear mode control motor circuit | Climate control unit | Signal error |
| B1223 | A problem in the rear blower motor circuit | Climate control unit | Signal error |
| B1225 | An open in the in-car temperature sensor circuit | Climate control unit | Signal error |
| B1226 | A short in the in-car temperature sensor circuit | Climate control unit | Signal error |
| B1227 | An open in the outside air temperature sensor circuit | Climate control unit | Signal error |
| B1228 | A short in the outside air temperature sensor circuit | Climate control unit | Signal error |
| B1229*2 | An open in the sunlight sensor circuit | Climate control unit | Signal error |
| B1230*2 | A short in the sunlight sensor circuit | Climate control unit | Signal error |
| B1231 | An open in the evaporator temperature sensor circuit | Climate control unit | Signal error |
| B1232 | A short in the evaporator temperature sensor circuit | Climate control unit | Signal error |
| B1233 | An open in the air mix control motor circuit (driver's) | Climate control unit | Signal error |
| B1234 | A short in the air mix control motor circuit (driver's) | Climate control unit | Signal error |
| B1235 | A problem in the air mix control motor circuit, linkage, door, or motor (driver's) | Climate control unit | Signal error |
| B1236*1 | An open in the passenger's air mix control motor circuit | Climate control unit | Signal error |
| B1237*1 | A short in the passenger's air mix control motor circuit | Climate control unit | Signal error |
| B1238*1 | A problem in the passenger's air mix control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B123F*3 | Automatic lighting control unit/sunlight sensor error | Climate control unit | Loss of communication |
| B1241 | A problem in the blower motor circuit | Climate control unit | Signal error |
| B1244 | An open in the rear air mix control motor circuit | Climate control unit | Signal error |
| B1245 | A short in the rear air mix control motor circuit | Climate control unit | Signal error |
| B1246 | A problem in the rear air mix control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B1248 | A problem in the rear mode control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
*1: With front dual zone climate control
*2: With automatic wiper or without automatic lighting
*3: Without automatic wiper and with automatic lighting
*4: With seat heater
| DTC | Detection Item or Symptom | ECU | DTC Type |
|---|---|---|---|
| B2964 | Climate control unit lost communication with front panel | Climate control unit | Loss of communication |
| B2966*1 | Climate control unit lost communication with rear panel (rear climate control panel) | Climate control unit | Loss of communication |
| B2967 | An open in the humidity sensor circuit | Climate control unit | Signal error |
| B2968 | A short in the humidity sensor circuit | Climate control unit | Signal error |
| B2969 | An open in the mode control motor A circuit | Climate control unit | Signal error |
| B2970 | A short in the mode control motor A circuit | Climate control unit | Signal error |
| B2971 | A problem in the mode control motor A circuit, linkage, door, or motor | Climate control unit | Signal error |
| B2972 | An open in the mode control motor B circuit | Climate control unit | Signal error |
| B2973 | A short in the mode control motor B circuit | Climate control unit | Signal error |
| B2974 | A problem in the mode control motor B circuit, linkage, door, or motor | Climate control unit | Signal error |
| B2983 | A problem in the recirculation control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B2986 | An open in the recirculation control motor circuit | Climate control unit | Signal error |
| B2988 | A problem in the A/C compressor variable capacity control solenoid circuit | Climate control unit | Signal error |
| U0180*3 | Climate control unit lost communication with automatic lighting control unit-sensor | Climate control unit | Loss of communication |
| U1280 | Communication bus line error (BUS-OFF) | Climate control unit | Loss of communication |
| U1281 | Climate control unit lost communication with MICU (body control module) | Climate control unit | Loss of communication |
| U128D | Climate control unit lost communication with gauge control module (VSP message) | Climate control unit | Loss of communication |
| U1290*4 | Climate control unit lost communication with seat heater control unit | Climate control unit | Loss of communication |
*1: With front dual zone climate control
*2: With automatic wiper or without automatic lighting
*3: Without automatic wiper and with automatic lighting
*4: With seat heater