AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC	Description
DTC B1204	13: Air Mix Potentiometer Open (Low) - Passenger
DTC B1205	11: Air Mix Potentiometer Short (High) - Passenger
DTC B1208	13: Intake Potentiometer Open (Low)
DTC B1209	11: Intake Potentiometer Short (High)
DTC B1233	11: Incar Temp Sensor Short (Low) - Front
DTC B1234	13: Incar Temp Sensor Open (High) - Front
DTC B1237	11: Ambient Temperature Sensor Short (Low)
DTC B1238	13: Ambient Temperature Sensor Open (High)
DTC B1241	11: Evaporator Sensor Short (Low)
DTC B1242	13: Evaporator Sensor Open (High)
DTC B1245	13: Air Mix Potentiometer Open (Low) - Driver
DTC B1246	11: Air Mix Potentiometer Short (High) - Driver
DTC B1249	13: Direction Potentiometer Open (Low) - Driver
DTC B1250	11: Direction Potentiometer Short (High) - Driver
DTC B1281	11: Humidity Sensor Short (Low) - AUTO Defog
DTC B1282	13: Humidity Sensor Open (High) - AUTO Defog
DTC B1283	13: Direction Potentiometer Open (Low) - AUTO Defog
DTC B1284	11: Direction Potentiometer Short (High) - AUTO Defog
DTC B1285	77: Direction Control Motor - AUTO Defog
DTC B1672	88: APT Sensor Fault - CAN Signal
DTC B1685	88: Engine RPM fault - CAN Signal
DTC B1686	88: Vehicle Speed Sensor Fault - CAN Signal
DTC B1687	88: Engine Coolant Temperature Sensor Fault - CAN Signal
DTC B16A4	13: ECV Fault
DTC B2406	77: Air Mix Motor - Driver
DTC B2408	77: Intake Motor
DTC B2409	77: Direction Control Motor - Driver
DTC B2415	77: Air Mix 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