AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC	Description
<DTC B1204	Air Mix Potentiometer Open (Low) - Passenger
<DTC B1205	Air Mix Potentiometer Short (High) - Passenger
<DTC B1208	Intake Potentiometer Open (Low)
<DTC B1209	Intake Potentiometer Short (High)
<DTC B1233	In-Car Temperature Sensor Short (Low)
<DTC B1234	In-Car Temperature Sensor Open (High)
<DTC B1237	Ambient Temperature Sensor Short (Low)
<DTC B1238	Ambient Temperature Sensor Open (High)
<DTC B1241	Evaporator Sensor Short (Low)
<DTC B1242	Evaporator Sensor Open (High)
<DTC B1245	Air Mix Potentiometer Open (Low)-Driver
<DTC B1246	Air Mix Potentiometer Short (High)-Driver
<DTC B1249	Direction Potentiometer Open (Low)-Driver
<DTC B1250	Direction Potentiometer Short (High)-Driver
<DTC B1281	Humidity Sensor Short (Low)? AUTO Defog
<DTC B1282	Humidity Sensor Open (High) - AUTO Defog
<DTC B1283	Direction Potentiometer Open (Low) - AUTO Defog
<DTC B1284	Direction Potentiometer Short (High) - Auto Defog
<DTC B1285	Direction Control Motor -AUTO Defog
<DTC B1672	APT Sensor Fault - CAN Signal
<DTC B1685	Engine RPM fault? CAN Signal
<DTC B1686	Vehicle Speed Sensor Fault? CAN Signal
<DTC B1687	Engine Coolant Temperature Sensor Circuit - CAN Signal
<DTC B1688	Cluster Ionizer Fault
<DTC B2406	Air Mix Motor - Driver
<DTC B2408	Intake Motor
<DTC B2409	Direction Control Motor-Driver
<DTC B2415	Air Mix Door Motor-Passenger

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.

Safety Warning

Air Conditioning System DTCS