Engine Oil Temperature Sensor Fault
This code indicates a problem with the engine oil temperature sensor or its circuit.
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 oil temperature sensor measures the temperature of the oil in the engine to ensure it’s within normal operating range. If this sensor fails, it can cause incorrect temperature readings. This can lead to engine performance issues or even damage if the oil overheats.
What the computer is actually seeing
The engine control module (ECM) expects the oil temperature to be between 140°F and 240°F (60°C to 115°C) under normal operating conditions. If the sensor reports temperatures outside this range or is unresponsive, the ECM sets this fault code.
What a healthy reading looks like
Expected oil temperature typically sits between 180°F to 220°F (82°C to 104°C). When warmed up, readings should stabilize in that range.
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 and condition. Ensure it’s within specifications and clean.
- 22. Inspect the wiring and connectors to the oil temperature sensor for damage or corrosion.
- 33. Use a scan tool to read live data for the oil temperature. Compare this with an external thermometer reading or the oil temperature gauge if equipped.
- 44. If the readings vary significantly (more than 20°F), replace the oil temperature sensor and retest.
- 55. If the code returns, check the ECM for updates or issues in the software.
Common causes
- Faulty engine oil temperature sensor
- Damaged wiring or connectors in the circuit
- Oil level too low or dirty oil affecting readings
- ECM software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
Moderately, as long as oil level is okay. But monitor performance closely; if overheating occurs, stop driving.
Will this code come back after I clear it?
If the underlying issue isn't fixed, the code will likely return after a short time.
Why does this code sometimes pair with a temperature gauge reading?
If the gauge reads high or erratic, it often indicates the sensor's malfunction affecting both the gauge and ECM input.
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