B2784 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2784 – Antenna Coil Open/Short

 

B2784 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2784 Possible Causes

 

Faulty Transponder key amplifier,Transponder key amplifier wire harness,Faulty tTransponder key ECU assy

 

B2784 Description

 

The transponder key coil is built into the transponder key amplifier and receives a key code signal from the transponder chip in the key. This signal is amplified by the amplifier, then it is output to the transponder key ECU assembly.