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 MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 735 (HEATING, VENTILATION AND AIR CONDITIONING)CLIMATE CONTROLDTC TROUBLESHOOTING INDEX
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
DTC Troubleshooting Index
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION DTC Troubleshooting Index
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
Checking the DTCs with the HDS
TROUBLESHOOTING CHART
| DTC | Detection Item or Symptom | ECU | DTC type |
|---|---|---|---|
| B1200 | Communication circuit error (BUS-OFF) | Climate control unit | Loss of communication |
| B1205 | Climate control unit lost communication with gauge control module (VSP/NE message) | Climate control unit | Loss of communication |
| B1206 | Climate control unit lost communication with gauge control module (ECT message) | Climate control unit | Loss of communication |
| B1207 | Climate control unit lost communication with gauge control module (ILLUMI message) | Climate control unit | Loss of communication |
| 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 | An open in the sunlight sensor circuit | Climate control unit | Signal error |
| B1230 | 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 | Climate control unit | Signal error |
| B1234 | A short in the air mix control motor circuit | Climate control unit | Signal error |
| B1235 | A problem in the air mix control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B1239 | An open or short in the mode control motor circuit | Climate control unit | Signal error |
| B1240 | A problem in the mode control motor circuit, linkage, doors, or motor | Climate control unit | Signal error |
| B1241 | A problem in the blower motor circuit | Climate control unit | Signal error |
| 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 | Climate control unit lost communication with MICU (WIPSW message) | Climate control unit | Loss of communication |
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.