Fuel Temperature Sensor Circuit Voltage Too High
Indicates the fuel temperature sensor voltage is outside normal parameters.
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 a higher-than-normal voltage from the fuel temperature sensor; this typically means there's a short in the wiring or an issue with the sensor itself.
What the computer is actually seeing
The ECM monitors the fuel temperature sensor output voltage, which should range between 0.5V to 4.5V. A voltage above 4.5V triggers this code.
What a healthy reading looks like
Normal fuel temperature sensor output is expected to be between 0.5V and 4.5V based on temperature ranging from -30°C to 100°C.
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 connectors for damage or corrosion. If found, repair or replace as necessary. Decision point: If wiring is good, go to step 2; if damaged, fix it and retest.
Common causes
- Shorts in the wiring harness
- Failed fuel temperature sensor
- Corrosion at the connector
- Open circuit in the sensor wiring
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but you might experience reduced fuel efficiency or performance issues.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return.
Why does this code show up with other SPN codes?
Codes often pair together due to related components or systems; in this case, sensor or wiring issues can affect multiple readings.
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 →