Oil Temperature Sensor Fault
The engine control module detects an issue with the oil temperature sensor reading.
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What it means (plain English)
The oil temperature sensor is not reading the oil temperature correctly, which could affect engine performance and oil pressure.
What the computer is actually seeing
The engine control module expects the oil temperature to be between 180°F and 220°F while running. If the sensor gives a reading below 160°F or above 230°F, or if it goes open circuit, the code is triggered.
What a healthy reading looks like
Expected oil temperature values: 180°F to 220°F (82°C to 104°C). If the reading is below 160°F or above 230°F, consider that a fault.
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 oil level; ensure it's within the proper range. If it's low, top it off and recheck the code.
- 22. Inspect the wiring and connectors for the oil temperature sensor for damage or corrosion. Repair as necessary.
- 33. Measure voltage at the sensor connector while the engine is running. You should see a voltage that reflects the oil temperature: 0.5V (cold) to 4.5V (hot). If out of range, replace the sensor.
- 44. If the sensor is good, check for an open or short in the wiring to the ECM. Use a multimeter to test continuity.
- 55. If there are no wiring issues, and the sensor reads correctly, replace the ECM.
Common causes
- Faulty oil temperature sensor
- Wiring issues or bad connectors
- Oil contamination
- Faulty engine control module (ECM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but if the oil temperature is incorrect, it might lead to engine damage over time. Fix it soon.
Will the code come back after clearing it?
If the underlying issue isn’t fixed, yes, the code will likely return.
Why does this code pair with SPN 1881?
SPN 1881 often indicates a related issue or intermittent fault in the oil temperature circuit.
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