Possible Causes
WARNING: This page is about a different car, the 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
This DTC uses two-trip detection logic. DTC is set when idle speed continues to vary greatly from target speed. Possible causes are:
- IAC valve is stuck or remains closed.
- IAC valve circuit is open or shorted.
- A/C switch circuit is open or shorted.
- Air induction system malfunction.
- Defective ECM.