Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Oil Temperature Sensor
FUNCTIONS WITHIN THE SYSTEM
The engine oil temperature signal that is received from the oil temperature signal is used by the ECM for valve timing control.
INDIVIDUAL FUNCTION WITHIN THE SYSTEM
The engine oil temperature sensor detects the engine oil temperature, converts it to an output voltage, and transmits a signal to the ECM.
INDIVIDUAL OPERATION
The engine oil temperature sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
| Temperature [°C (°F)] | Voltage* (V) | Resistance (kΩ) |
|---|---|---|
| -10 (14) | 4.4 | 7.0 - 11.4 |
| 20 (68) | 3.5 | 2.37 - 2.63 |
| 50 (122) | 2.2 | 0.68 - 1.00 |
| 90 (194) | 0.9 | 0.236 - 0.260 |
| 110 (230) | 0.6 | 0.143 - 0.153 |
*: These data are reference values and are measured between ECM terminals.
COMPONENT LOCATION
The engine oil temperature sensor is installed to the cylinder block.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.