Excessive Fuel Temperature
Fuel temperature is too high for proper operation.
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What it means (plain English)
The fuel temperature sensor is reporting that the fuel is hotter than it should be, which could lead to issues with combustion and engine performance.
What the computer is actually seeing
The Engine Control Unit (ECU) monitors the fuel temperature sensor output, which should be between 25°C to 65°C (77°F to 149°F) during normal operation. High temperatures can trigger the fault code.
What a healthy reading looks like
Normal fuel temperature should range between 25°C to 65°C (77°F to 149°F).
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. Inspect the fuel temperature sensor wiring and connector for damage or corrosion. Decision: Is the wiring intact? If yes, proceed. If no, repair wiring/connectors.
- 22. Check the fuel temperature sensor for proper resistance using a multimeter. Expected resistance at 25°C should be around 2.5 kΩ. Decision: Does the sensor meet this value? If yes, proceed. If no, replace the sensor.
- 33. Inspect the fuel system for clogs or restrictions. Check the fuel filter and lines to ensure there is enough flow. Decision: Is fuel flow normal? If yes, proceed. If no, clear the clog or replace the filter.
- 44. Verify engine operating temperature with a scan tool or gauge. Ensure coolant systems are functioning properly. Decision: Is the engine overheating? If yes, address overheating issues.
Common causes
- Faulty fuel temperature sensor
- Wiring issues or damaged connectors
- Low fuel flow or fuel supply issues
- Clogged fuel filter
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I still drive with this code?
It's not advisable to drive with high fuel temperature as it can affect engine performance and efficiency.
Will this code come back after clearing?
If the underlying issue is not fixed, yes, the code will likely return.
Why does this issue appear alongside SPN 2601?
SPN 2601 relates to fuel temperature monitoring, so faults may share causes or affect the same systems.
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