Possible Causes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when idle speed continues to vary greatly from target speed (2 trip detection logic). Possible causes are:
- Defective Positive Crankcase Ventilation (PCV) valve hose or connection.
- Defective ETCS.
- Air induction system malfunction.