Test KE: Step 20

20) Code 47: Check For Low Flow of Unmetered Air  Code 47 indicates that measured airflow at base idle was lower than ECA specification. Possible causes for this fault are: air/vacuum leaks in fuel charging system or faulty or leaking purge solenoid and/or leaking injector "O" rings. Check for holes, cracks and or disconnections in fuel charging assembly. Check for a stuck open purge solenoid or injector "O" rings. Service any faults as necessary and rerun QUICK TEST. If no faults are present, EEC-IV system is okay. Service other codes as necessary.