B1222 The rear climate control unit saw a short in the rear mode control motor circuit
What does B1222 mean on a Honda?
B1222. The rear climate control unit saw a short in the rear mode control motor circuit. Rear air may stay stuck on one vent position. This Honda-enhanced code applies to Honda and Acura models that use this code.
Common causes of B1222
- Faulty rear mode control motor
- Rear mode control motor harness is open or shorted
- Rear mode control motor circuit poor electrical connection
- Faulty climate control unit
- Seized or binding air door putting the motor circuit out of range
How to fix B1222
- Confirm the code with a scan tool and check the climate control for related faults
- Inspect the motor connector and the air door for binding or damage
- Test the motor windings and the position signal at the connector
- Check the wiring for an open or short before replacing the motor
- Replace the rear mode control motor if it fails testing, then clear codes and retest
Sources and review
- Last updated 2026-09-29.