OBD-II code · Powertrain (generic)
P008F Engine Coolant Temperature/Fuel Temperature Correlation
Engine coolant temperature and fuel temperature readings are inconsistent — at long soak both should be near ambient and converge under load. One sensor has drifted.
Is it safe to drive with P008F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne temperature sensor reading drifted
Symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Coolant Temp Sensor, Fuel Temp Sensor
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.