B1248 The climate control unit found a problem in the rear mode motor, linkage, or door

What does B1248 mean on a Honda?

B1248. The climate control unit found a problem in the rear mode motor, linkage, or door. 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 B1248

• Faulty rear mode control motor
• Binding or damaged air door or linkage
• Rear mode control motor harness is open or shorted
• Rear mode control motor circuit poor electrical connection
• Faulty climate control unit

How to fix B1248

1. Confirm the code with a scan tool and check the climate control for related faults
2. Inspect the linkage and air door for binding, broken parts, or debris
3. Test the motor and its position feedback at the connector
4. Check the wiring for an open or short before replacing parts
5. Replace the rear mode control motor only if it and the linkage fail testing, then clear codes and retest

Sources and review

• Last updated 2026-09-29.