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
Engine Oil Temperature (EOT) sensor is a thermistor device which changes resistance proportionate to temperature changes. Resistance increases as engine oil temperature decreases and decreases as engine oil temperature increases. EOT sensor provides engine oil temperature to PCM. On some applications, EOT sensor input to PCM is used to initiate a soft engine shutdown. This prevents engine damage from occurring as a result of high oil temperature.
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.