B1250 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1250 – Combination Switch Control Unit

 

B1250 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1250 Possible Causes

 

Faulty Combination Switch Control Unit,Combination Switch Control Unit harness is open or shorted,Combination Switch Control Unit circuit poor electrical connection

 

B1250 Description

 

The Multiplex Control Unit Module (MICU) monitors the Combination Switch Control Unit. The MICU sets the OBDII code when the Combination Switch Control Unit is not to factory specifications.