Operation CHARM: Car repair manuals for everyone.

B1235

DTC B1235: A Problem in the Driver's Air Mix Control Linkage, Door, or Motor

1. Clear the DTC.
2. Turn the ignition switch OFF, and then ON.
3. Operate the climate control system is several modes.
4. Check the DTCs.

Is DTC K or B1235 indicated?

YES - Go to step 5.

NO - Intermittent failure.

5. Test the driver's air mix control motor.

Is the driver's air mix control motor OK?

YES - Substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display panel.

NO - Replace the driver's air mix control motor, or repair the driver's air mix control linkage or door.