B2394 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2394 – Flash To Pass / Optical Horn Switch Circuit Stuck

 

B2394 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2394 Possible Causes

 

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

 

B2394 Description

 

The Cluster monitors the Flash To Pass / Optical Horn Switch Circuit. The Diagnostic Trouble Code (DTC) is set when the Cluster detects the Flash to Pass Switch Input circuit voltage is less than the expected value.