Thermal Management System Temperature Sensor Out of Range
The temperature sensor in the thermal management system is reporting out-of-range values.
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What it means (plain English)
The thermal management system's temperature sensor is reading too high or too low, which can affect engine cooling and performance.
What the computer is actually seeing
The Engine Control Unit (ECU) sees the temperature input from the sensor fluctuate outside the normal 50°F to 240°F range.
What a healthy reading looks like
Normal operation should see values between 50°F and 240°F; anything below or above will trigger the fault code.
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 wiring and connectors at the temperature sensor for damage or corrosion. Repair as necessary. Decision: Are the connections good? Yes: Go to step 2. No: Repair connections and retest.
- 22. Measure the temperature sensor resistance with a multimeter. At room temperature, it should be roughly 2.5k ohms. Decision: Is resistance within spec? Yes: Go to step 3. No: Replace the sensor and retest.
- 33. Start the engine and monitor the live data for the temperature reading. It should show a gradual increase as engine warms-up. Decision: Does the temperature reading respond as expected? Yes: Check the ECU for fault codes and further issues. No: Investigate the thermal management system for faults.
Common causes
- Faulty temperature sensor
- Wiring issues (shorts or opens in the harness)
- Bad ECU connection
- Thermal management system malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you should fix it soon, as it could lead to overheating.
Will this code come back after clearing?
If repairs are done correctly, it should not return.
Why does this code pair with other SPN codes?
Multiple sensor failures can occur concurrently, indicating broader system issues.
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