Engine Oil Temperature Sensor Fault
This code indicates a fault in the engine oil temperature sensor 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 has a sensor that measures how hot the oil is. If it gets a reading that's too high or too low, it throws this code.
What the computer is actually seeing
The Engine Control Module (ECM) sees the signal from the oil temperature sensor indicating a temperature outside of the normal range, usually below 70°F or above 300°F.
What a healthy reading looks like
Normal oil temperature should be between 180°F to 220°F during operation.
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 the engine oil level and condition; add oil or change if low/dirty.
- 2Visually inspect wiring and connectors for damage or corrosion—repair as needed.
- 3Use a scan tool to check actual oil temperature readings while the engine is running; compare to expected values.
- 4If the oil temperature is reading correctly, consider replacing the oil temperature sensor.
- 5If the reading is still out of range, check for ECM updates or faults.
Common causes
- Faulty engine oil temperature sensor
- Wiring issues (shorts or opens)
- Connector corrosion or damage
- ECM software glitch
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but keep an eye on oil temperature. If it exceeds normal range, stop the vehicle to prevent engine damage.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will return.
Why does this code seem to appear with other codes?
This can happen if multiple sensors are failing or if there’s a common wiring issue affecting several circuits.
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