P0168
PowertrainFuel Systemmoderate severityFuel Temperature Too High
What P0168 Means
The PCM has detected that fuel temperature has exceeded the expected safe range. High fuel temperature can affect fuel density and injection accuracy, impacting performance and emissions.
Symptoms
- Reduced engine power
- Poor fuel economy
- Check engine light on
Common Causes
- Faulty fuel temperature sensor
- Return fuel line overheating near exhaust
- Wiring or connector fault at sensor
- Actual overheated fuel due to low tank level
Diagnostic Steps
- Read fuel temperature sensor value with scan tool
- Compare reading to actual fuel/ambient temperature
- Inspect sensor wiring and connectors for damage
- Test sensor resistance against spec and replace if faulty
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