B2785 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2785 – Ignition Switch On Malfunction Immobilizer System

 

B2785 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2785 Possible Causes

 

Faulty Ignition switch,Faulty EFI main relay,Ignition switch harness is open or shortec,Ignition switch circuit poor electrical connection,Faulty Engine Control Module (ECM)

 

B2785 Description

 

This Diagnostic Trouble Code (DTC) is output if communication between the transponder key Electronic Control Unit (ECU) and power source control ECU is not possible.