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
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.