B1221 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1221 – Open In The Rear Mode Control Motor Circuit

 

B1221 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1221 Possible Causes

 

Faulty Rear Mode Control Motor,Rear Mode Control Motor harness is open or shorted,Rear Mode Control Motor circuit poor electrical connection,Faulty Rear Climate Control Unit,Faulty A/C Control Panel

 

B1221 Description

 

The Rear Climate Control Unit monitors the Rear Mode Control Motor. The Rear Climate Control Unit sets the OBDII code when the Rear Mode Control Motor is not to factory specifications.