Heating/Air Conditioning DTCS
HEATING/AIR CONDITIONING DTC TROUBLESHOOTING CHART
| DTC | Detection Item or Symptom |
|---|---|
| U1280 | Communication bus line error (BUS-OFF) |
| U128D | Lost communication with gauge control module (HVAC control unit) |
| B1215 | An open or short in the recirculation control motor 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 (front) |
| B1234 | A short in the air mix control motor circuit (front) |
| B1235 | A problem in the air mix control motor circuit, linkage, door, or motor (front) |
| B1239 | An open or short in the mode control motor circuit (front) |
| B1240 | A problem in the mode control motor circuit, linkage, door, or motor (front) |
| B1241 | A problem in the blower motor circuit (front) |
| B2965 | Rear communication failure |
| B2979 | An open in the A/C pressure sensor circuit |
| B2980 | A short in the A/C pressure sensor circuit |
| B2983 | A problem in the recirculation control motor circuit, linkage, door, or motor |