P0168
Fuel Temperature Too High
Fuel temperature exceeds the safe maximum. Risk of fuel pump damage and injection imprecision.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Fuel cooler not effectiveCommon
Parts involved
- Fuel Temp Sensor
- Fuel Cooler
- Fuel Return
P0168 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.