Engine Over Temperature
The engine is running too hot and may suffer damage if not addressed.
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 computer is reading high engine temperatures, meaning the coolant or oil is likely not cooling the engine properly.
What the computer is actually seeing
The engine control module detects a coolant temperature reading greater than 230°F (110°C) for a consistent period, indicating potential overheating.
What a healthy reading looks like
Coolant temperature should typically be between 180°F (82°C) and 220°F (104°C) for proper 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.
- 11. Check coolant level in the reservoir – should be at or near the 'full' mark. If low, add coolant. Decision: If low, refill and monitor. If normal, proceed to the next step.
- 22. Inspect for leaks in the cooling system (hoses, radiator, water pump) – look for signs of fluid on the ground or around components. Decision: If leaks are found, repair them. If none, proceed.
- 33. Verify operation of the thermostat by checking if it opens at the appropriate temperature. Use a scan tool to check the temperature readings when the engine is warmed up – it should open around 195°F (91°C). Decision: If thermostat fails to open, replace. If not, continue.
Common causes
- Low coolant level
- Faulty thermostat
- Damaged water pump
- Cooling system blockage
- Faulty temperature sensor
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, driving while overheating can cause serious engine damage.
Will this code come back after being cleared?
Yes, if the underlying issue isn't fixed, it will return.
Why does this code sometimes pair with SPN 3211?
SPN 3211 indicates a faulty coolant temperature sensor, which can trigger an overheating warning.
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 →