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.