B2274 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B2274 – ACC Monitor Malfunction

 

B2274 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B2274 Possible Causes

 

Faulty ACC Relay,Faulty Certification ECU (Smart Key ECU Assembly),Certification ECU harness is open or shorted,Certification ECU circuit poor electrical connection

 

B2274 Description

 

This Diagnostic Trouble Code (DTC) is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the Certification ECU (Smart Key ECU Assembly) to the ACC Relay.