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.
Climate Control System DTCS
's Air Mix Control Motor Circuit DTC B1234 A Short in the Driver's Air Mix Control Motor Circuit DTC B1235 A Problem in the Driver's Air Mix Control Linkage, Door, or Motor Circuit DTC B1236 An Open in the Passenger's Air Mix Control Motor Circuit DTC B1237 A Short in the Passenger's Air Mix Control Motor Circuit DTC B1238 A Problem in the Passenger's Air Mix Control Linkage, Door, or Motor Circuit DTC B1239 An Open or Short in the Driver's Mode Control Motor Circuit DTC B1240 A Problem in the Driver's Mode Control Linkage, Doors, or Motor Circuit DTC B1241 A Problem in the Blower Motor Circuit DTC B1242 An Open or Short in the Passenger's Mode Control Motor Circuit DTC B1243 A Problem in the Passenger's Mode Control Linkage, Doors, or Motor Circuit DTC B2967 An Open in the Humidity Sensor Circuit DTC B2968 A Short in the Humidity Sensor Circuit DTC B2969 Climate Control Unit Lost Communication with Driver's MICU (WIPSW message) DTC B2979 An Open in the A/C Pressure Sensor Circuit DTC B2980 A short in the A/C Pressure Sensor Circuit DTC B2983 A Problem in the Recirculation Control Linkage, Door, or Motor Circuit
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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.
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