Rare Engine Over Temperature Condition
The engine control unit detected a rare situation where the engine temperature exceeded safe limits.
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 computer is seeing a temperature reading above 230°F (110°C) when it shouldn't, likely due to a fault or sensor issue.
What the computer is actually seeing
Engine temperature sensor signals indicating temperatures above 230°F (110°C) for a sustained period, during which normal operating temperatures should be between 180°F and 220°F (82°C to 104°C).
What a healthy reading looks like
Normal operating temperature should stay between 180°F and 220°F (82°C to 104°C). If readings exceed 230°F (110°C) for too long, the engine can go into protection mode.
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 coolant level: Ensure it's at the proper level. If low, add coolant and retest.
- 22. Inspect for leaks: Look for any signs of coolant leaking under the vehicle.
- 33. Check for air in the cooling system: Bleed air if needed, as trapped air can cause overheating.
- 44. Verify the engine temperature sensor's operation: Measure resistance at different temperatures (should be between 4,000 - 12,000 ohms at 80°F).
- 55. Inspect the thermostat operation: Check if it opens when the engine reaches operating temperature by using a temperature gauge.
- 66. Check radiator and water pump function: Ensure they are working properly by observing coolant flow and temperature drop.
Common causes
- Faulty engine temperature sensor
- Low coolant level or leaks
- Thermostat stuck closed
- Water pump failure
- Clogged radiator
- Wiring issues with the temperature sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to address this issue quickly to prevent engine damage, so avoid long drives until resolved.
Will this code come back after clearing?
If the underlying issue isn't fixed, expect it to return after a short period of operation.
Why does this code pair with others?
It often appears with other coolant or temperature-related fault codes due to interconnected systems.
Working a real vehicle right now?
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