Diagnostic Aids
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
Use scan tool to access CURRENT DATA to confirm mass airflow value. If value is 0.0 gm/sec., mass airflow sensor power source circuit is open or VG circuit is open or short. If value is 271.0 gm/sec. or more, EVG circuit may be open. Using scan tool, read freeze frame data. Freeze frame records engine conditions when malfunction is detected.