B1678 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1678 – Alarm Panic Input Circuit Open

 

B1678 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B1678 Possible Causes

 

Faulty Alarm Panic Input Sensor,Alarm Panic Input Sensor harness is open or shorted,Alarm Panic Input Sensor circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B1678 Description

 

The Body Control Module (BCM) monitors the Alarm Panic Input Sensor. The BCM sets the OBDII code when the Alarm Panic Input Sensor is not to factory specifications.