U1149 Code: Meaning, Causes, and Symptoms | OBD2 Codes

U1149 – Lost Communication With Multi-Function Switch


U1149 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


U1149 Possible Causes


Faulty Left Multifunction Switch,Left Multifunction Switch harness is open or shorted,Left Multifunction Switch circuit poor electrical connection


U1149 Description


The Powertrain Control Module (PCM) monitors the Multi-Function Switch. The PCM sets the OBDII code when the Multi-Function Switch is not to factory specifications or the Cluster does not receive any LIN Bus messages from the Left Multifunction Switch.