Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when there is no IGF signal to ECM when engine is running. Possible causes are:
- Ignition system malfunction.
- IGF or IGT1-4 circuit from ignition coil to ECM is open or shorted.
- Defective ignition coil with ignitor.
- Defective ECM.