DTC P0115: Engine Coolant Temperature Circuit; DTC P0117: Engine Coolant Temperature Circuit Low Input; DTC P0118: Engine Coolant Temperature Circuit High Input [09/2014 - 11/2017]: Description
A thermistor, whose resistance value varies according to the engine coolant temperature, is built into the engine coolant temperature sensor. The structure of the sensor and its connection to the ECM are the same as those of the intake air temperature sensor.
HINT:
When DTC P0115, P0117 or P0118 is stored, the ECM enters fail-safe mode. During fail-safe mode, the engine coolant temperature is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P0115 | Engine Coolant Temperature Circuit | An open or short in the engine coolant temperature sensor circuit for 0.5 seconds (1 trip detection logic). |
|
Comes on | DTC stored |
| P0117 | Engine Coolant Temperature Circuit Low Input | A short in the engine coolant temperature sensor circuit for 0.5 seconds (1 trip detection logic). |
|
Comes on | DTC stored |
| P0118 | Engine Coolant Temperature Circuit High Input | An open in the engine coolant temperature sensor circuit for 0.5 seconds (1 trip detection logic). |
|
Comes on | DTC stored |
HINT:
When any of these DTCs are output, check the engine coolant temperature using the Techstream. Enter the following menus on the Techstream: Powertrain / Engine and ECT / Data List / Primary / Coolant Temp.
| Temperature Displayed | Malfunction |
|---|---|
| -40°C (-40°F) | Open circuit |
| Higher than 135°C (275°F) | Short circuit |