C2309 Code: Meaning, Causes, and Symptoms | OBD2 Codes

C2309 – Open In B+ Circuit


C2309 Possible Symptoms


Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)


C2309 Possible Causes


Faulty Transmission Control ECU Assembly,Transmission Control ECU harness is open or shorted,Transmission Control ECU circuit poor electrical connection,Faulty Auxiliary Battery


C2309 Description


Battery voltage will be applied to the +B terminal when the power switch is turned on (IG). When a +B terminal voltage malfunction is detected, the Transmission Control ECU outputs this Diagnostic Trouble Code (DTC).