B1279 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1279 – Dimmer Switch Circuit Malfunction
B1279 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1279 Possible Causes
Faulty Dimmer Switch,Dimmer Switch harness is open or shorted,Dimmer Switch circuit poor electrical connection,Faulty Multiplex Integrated Control Unit (MICU)
The Multiplex Integrated Control Unit (MICU) monitors the Dimmer Switch. The MICU sets the OBDII code when the Dimmer Switch is not to factory specifications.