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:
- For DTC P0115, there is an open or short in engine coolant temperature sensor circuit for 0.5 second.
- For DTC P0117, there is a short in engine coolant temperature sensor circuit for 0.5 second.
- For DTC P0118, there is an open in engine coolant temperature sensor circuit for 0.5 second.
Possible causes are:
- ECT sensor circuit is open or shorted.
- Defective ECT sensor.
- Defective ECM.