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:
- Deviation in crankshaft position sensor signal and VVT sensor (bank No. 1) signal (2 trip detection logic).
- Defective mechanical system (jumping teeth of timing chain, chain stretched).
- Defective ECM.