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 MANUALSHONDA2009ODYSSEY EX-LREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSCLIMATE CONTROL
2009 Honda Odyssey EX-L
Climate Control
2009 Honda Odyssey EX-LSECTION Climate Control
- Component Location Index
- A/C Refrigerant Oil Replacement
- A/C Line Replacement
- General Troubleshooting Information
- Retrieving DTCs (without HDS)
- Checking DTCs by DTC Indicator
- How to Check for DTCs with the HDS
- Communication circuit self-diagnostic function ('07 EX and EX-L models)
- Communication Circuit self-diagnostic Function Test ('07 Touring model and '08-09 EX, EX-L, and Touring models)
- Displaying Sensor Inputs at the Front Climate Control Unit
- Check these items before using the sensor input display mode
- To run the sensor input display mode, follow these steps
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- Circuit Diagram
- DTC Troubleshooting
- DTC B1225 or DTC indicator A and AUTO: An Open in the In-car Temperature Sensor Circuit
- DTC B1226 or DTC indicator B and AUTO: A Short in the In-car Temperature Sensor Circuit
- DTC B1227 or DTC indicator C and AUTO: An Open in the Outside Air Temperature Sensor Circuit
- DTC B1228 or DTC indicator D and AUTO: A Short in the Outside Air Temperature Sensor Circuit
- DTC B1229 or DTC indicator E and AUTO: An Open in the Sunlight Sensor Circuit
- DTC B1230 or DTC indicator F and AUTO: A Short in the Sunlight Sensor Circuit
- DTC B1231 or DTC indicator G and AUTO: An Open in the Evaporator Temperature Sensor Circuit
- DTC B1232 or DTC indicator H and AUTO: A Short in the Evaporator Temperature Sensor Circuit
- DTC B1233 or DTC indicator I and AUTO: An Open in the Driver's Air Mix Control Motor Circuit
- DTC B1234 or DTC indicator J and AUTO: A Short in the Driver's Air Mix Control Motor Circuit
- DTC B1235 or DTC indicator K and AUTO: A Problem in the Driver's Air Mix Control Linkage, Door, or Motor
- DTC B1236 or DTC indicator L and AUTO: An Open in the Passenger's Air Mix Control Motor Circuit
- DTC B1237 or DTC indicator M and AUTO: A Short in the Passenger's Air Mix Control Motor Circuit
- DTC B1238 or DTC indicator N and AUTO: A Problem in the Passenger's Air Mix Control Linkage, Door, or Motor
- DTC B1239 or DTC indicator A: An Open or Short in the Front Mode Control Motor Circuit
- DTC B1240 or DTC indicator B: A Problem in the Front Mode Control Linkage, Doors, or Motor
- DTC B1241 or DTC indicator C: A Problem in the Front Blower Motor Circuit
- DTC B1249 or DTC indicator D: An Open in the Rear In-car Temperature Sensor Circuit (with Rear Climate Control)
- DTC B1224 or DTC indicator E: A Short in the Rear In-car Temperature Sensor Circuit (with Rear Climate Control)
- DTC B1244 or DTC indicator F: An Open in the Rear Air Mix Control Motor Circuit
- DTC B1245 or DTC indicator G: A Short in the Rear Air Mix Control Motor Circuit
- DTC B1246 or DTC indicator H: A Problem in the Rear Air Mix Control Linkage, Door, or Motor
- DTC B1221 or DTC indicator I: An Open in the Rear Mode Control Motor Circuit
- DTC B1222 or DTC indicator J: A Short in the Rear Mode Control Motor Circuit
- DTC B1248 or DTC indicator K: A Problem in the Rear Mode Control Linkage, Doors, or Motor
- DTC B1223 or DTC indicator L: A Problem in the Rear Blower Motor Circuit
- DTC B1202: Front Climate Control Unit Internal Error
- DTC B1205: Front Climate Control Unit Lost Communication with Gauge Control Module (VSP/NE message); DTC B1206: Front Climate Control Unit Lost Communication with Gauge Control Module (ENGTEMP message); DTC B1207: Front Climate Control Unit Lost Communication with Gauge Control Module (ILLUMI message)
- Recirculation Control Motor Circuit Troubleshooting
- Navigation Communication Line Circuit Troubleshooting
- Climate Control Panel Power and Ground Circuit Troubleshooting
- Rear Control Panel Power and Ground Circuit Troubleshooting
- Climate Control Communication Circuit Troubleshooting
- Front Climate Control Unit Power and Ground Circuit Troubleshooting
- Rear Climate Control Unit Power and Ground Circuit Troubleshooting
- A/C Pressure Switch Circuit Troubleshooting
- In-car Temperature Sensor Test
- In-car Temperature Sensor Replacement
- Outside Air Temperature Sensor Test
- Outside Air Temperature Sensor Replacement
- Sunlight Sensor Test
- Sunlight Sensor Replacement
- Passenger's Air Mix Control Motor Test
- Passenger's Air Mix Control Motor Replacement
- Climate Control Panel Removal/Installation
- Front Climate Control Unit Removal /Installation
- Dust and Pollen Filter Replacement
- Blower Unit Removal/Installation
- A/C Compressor Replacement
RENDER: 1.0x
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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.