What does it mean?
B1261 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Air Mix Potentiometer Short (High)-Console .
Symptoms
- Console or rear zone temperature is stuck at one extreme
- Rear passengers get only hot or only cold air whatever they select
- The feedback value in live data is pegged at maximum and does not follow commands
- The actuator may click repeatedly under the console
- Front zone temperature control still works normally
Likely causes
- Shorted or worn wiper track inside the console air mix actuator potentiometer
- Feedback signal wire shorted to the reference voltage in the console harness
- Missing or high resistance ground on the console actuator circuit, pushing the feedback high
- Liquid spilled into the centre console reaching the actuator connector
- Harness pinched under the console when it was last reassembled
- Reference or input circuit fault inside the climate control module
How to fix it
- Read the console air mix feedback value while sweeping the rear temperature setting
- Remove the console trim and inspect the actuator connector for spilled liquid and corrosion
- Measure the reference voltage and the ground quality at the actuator connector with the ignition on
- Check the feedback wire for a short to the reference circuit with both ends disconnected
- Measure the actuator potentiometer through its travel; a pegged or erratic reading condemns it
- Repair the wiring or replace the actuator, then run the climate calibration procedure