Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Idle speed continues to vary greatly from target speed (2 trip detection logic).
- Defective throttle body assembly.
- Defective air induction system.
- Defective PCV hose connection.
- Defective ECM.