Engine Fuel Temperature Sensor Voltage Too High
The fuel temperature sensor is reporting a voltage that exceeds expected limits.
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What it means (plain English)
The engine has a fuel temperature sensor that measures how hot the fuel is. If that sensor sends back a voltage higher than about 2.5 volts when it should be lower, it triggers this code.
What the computer is actually seeing
The engine control module (ECM) is checking the fuel temperature sensor voltage, which should typically range from 0.5 to 2.5 volts. Anything above that means the sensor might be faulty or there's a wiring issue.
What a healthy reading looks like
Fuel temperature sensor voltage should be between 0.5V and 2.5V.
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 for any visible damage to the wiring and connectors leading to the fuel temperature sensor.
- 2Use a multimeter to measure the voltage at the fuel temperature sensor connector. Expect 0.5V to 2.5V at normal operating conditions.
- 3If the voltage exceeds 2.5V, replace the fuel temperature sensor and retest.
- 4If the voltage is normal, check the wiring for shorts or opens. Repair any damaged wiring as necessary.
Common causes
- Faulty fuel temperature sensor
- Short in wiring harness
- Open circuit in wiring
- Corroded connector pins
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity suggests you should fix this soon, as it may affect fuel efficiency and performance.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, the code will likely return.
Why might this code trigger alongside SPN 1171?
SPN 1171 indicates low voltage from the same sensor, which can happen if the sensor is faulty or there's a wiring problem.
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