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.
HVAC System DTCS
| DTC | Description |
|---|---|
| B1213 | An open in the rear evaporator temperature sensor circuit |
| B1214 | A short in the rear evaporator temperature sensor circuit |
| B1220 | A short in the recirculation control motor circuit |
| B1221 | An open in the rear mode control motor circuit |
| B1222 | A short in the rear mode control motor circuit |
| B1223 | A problem in the rear blower motor circuit |
| B1225 | An open in the in-car temperature sensor circuit |
| B1226 | A short in the in-car temperature sensor circuit |
| B1227 | An open in the outside air temperature sensor circuit |
| B1228 | A short in the outside air temperature sensor circuit |
| B1229*2 | An open in the sunlight sensor circuit |
| B1230*2 | A short in the sunlight sensor circuit |
| B1231 | An open in the evaporator temperature sensor circuit |
| B1232 | A short in the evaporator temperature sensor circuit |
| B1233 | An open in the air mix control motor circuit (driver's) |
| B1234 | A short in the air mix control motor circuit (driver's) |
| B1235 | A problem in the air mix control motor circuit, linkage, door, or motor (driver's) |
| B1236*1 | An open in the passenger's air mix control motor circuit |
| B1237*1 | A short in the passenger's air mix control motor circuit |
| B1238*1 | A problem in the passenger's air mix control motor circuit, linkage, door, or motor |
| B123F*3 | Automatic lighting control unit/sunlight sensor error |
| B1241 | A problem in the blower motor circuit |
| B1244 | An open in the rear air mix control motor circuit |
| B1245 | A short in the rear air mix control motor circuit |
| B1246 | A problem in the rear air mix control motor circuit, linkage, door, or motor |
| B1248 | A problem in the rear mode control motor circuit, linkage, door, or motor |
*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 | Description |
|---|---|
| B2964 | Climate control unit lost communication with front panel |
| B2966*1 | Climate control unit lost communication with rear panel (rear climate control panel) |
| B2967 | An open in the humidity sensor circuit |
| B2968 | A short in the humidity sensor circuit |
| B2969 | An open in the mode control motor A circuit |
| B2970 | A short in the mode control motor A circuit |
| B2971 | A problem in the mode control motor A circuit, linkage, door, or motor |
| B2972 | An open in the mode control motor B circuit |
| B2973 | A short in the mode control motor B circuit |
| B2974 | A problem in the mode control motor B circuit, linkage, door, or motor |
| B2983 | A problem in the recirculation control motor circuit, linkage, door, or motor |
| B2986 | An open in the recirculation control motor circuit |
| B2988 | A problem in the A/C compressor variable capacity control solenoid circuit |
| U0180*3 | Climate control unit lost communication with automatic lighting control unit-sensor |
| U1280 | Communication bus line error (BUS-OFF) |
| U1281 | Climate control unit lost communication with MICU (body control module) |
| U128D | Climate control unit lost communication with gauge control module (VSP message) |
| U1290*4 | Climate control unit lost communication with seat heater control unit |
*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
Use the Manual With the Right Hardware
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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.