DTC DETECTION LOGIC

DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0491
Secondary air injection system insufficient flow (bank 1)
Though the secondary air injection system is operating, the secondary airflow to the exhaust port is too small.
  • Harness or connectors
    (Air cut solenoid valve circuit is open or shorted)
    (Air cut solenoid valve relay circuit is open or shorted)
  • Air cut solenoid valve
  • Air cut solenoid valve relay
  • Disconnection, clogging, collapsing and damage of hose or piping
P0492
Secondary air injection system insufficient flow (bank 2)

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE