Oil Temperature Sensor Fault
The oil temperature sensor signal is out of range.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine's computer can't read the oil temperature correctly, either because the sensor is broken or there's a wiring problem.
What the computer is actually seeing
The Engine Control Module (ECM) expects an oil temperature around 180°F to 220°F (82°C to 104°C) but detects values that are too high or too low, usually below 14°F (-10°C) or above 248°F (120°C).
What a healthy reading looks like
Normal oil temperature range: 180°F to 220°F (82°C to 104°C).
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.
- 11. Check the engine oil level; ensure it is at the correct level and the fluid is clean without contaminants. - Decision: If low or dirty, change the oil, check the sensor again.
- 22. Inspect the wiring and connectors at the oil temperature sensor for damage, corrosion, or loose connections. - Decision: If any issues are found, repair/replace the wiring or connectors and test again.
- 33. Use a scan tool to check the actual oil temperature reading from the ECM and compare it to the expected values. - Decision: If reading is out of range after previous checks, replace the oil temperature sensor.
Common causes
- Faulty oil temperature sensor
- Wiring issues or open circuits
- Corrosion or poor connections at the sensor
- Engine oil temperature outside normal range due to overheating or incorrect fluid type
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderately serious; you'll be able to drive, but get it checked soon to prevent potential overheating.
What happens if I ignore this code?
Ignoring it could lead to engine damage due to overheating if the oil temperature truly is too high.
Why are there other SPN codes related to this one?
Related codes usually indicate issues in the same sensor or system, like temperature readings from different parts of the engine.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →