Oil Temperature Sensor Circuit Performance Problem
The engine oil temperature sensor is malfunctioning or giving unexpected readings.
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What it means (plain English)
The oil temperature sensor reads the temperature of the engine oil. If it fails, the computer can't get accurate temp readings, which can lead to either overheating or poor engine performance.
What the computer is actually seeing
The engine control unit (ECU) sees temperature readings from the oil sensor that are outside the expected range, typically below 50°F or above 300°F when the engine is running.
What a healthy reading looks like
Expected oil temperature range is typically between 160°F and 220°F while the engine is at operating temperature.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check oil level and condition; ensure it's within spec and not contaminated.
- 2Inspect wiring and connectors going to the oil temperature sensor for damage or corrosion.
- 3Use a scan tool to check for any other related codes that could indicate broader issues with the engine or sensors.
- 4Test the oil temperature sensor with a multimeter; compare the resistance readings to the manufacturer's specifications.
- 5If sensor readings are incorrect or out of range when tested, replace the oil temperature sensor.
Common causes
- Faulty engine oil temperature sensor
- Wiring issues or open/short circuits in the sensor circuit
- Corrosion or poor connection at the sensor plug
- Low engine oil level or contaminated oil
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code?
Yes, but it is wise to fix it soon as it could affect engine performance and longevity.
What will happen if I ignore it?
Ignoring it can lead to engine damage from overheating or incorrect oil usage.
Why is this code showing up with low oil pressure?
Low oil pressure can indicate that the oil is too hot or that there's a problem with the oil flow, both of which could be linked.
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