OBD-II code · Powertrain (generic, extended)
P24F3 Reductant Tank Temperature/Fuel Temperature Correlation
After a long key-off soak the AdBlue/DEF tank temperature and the fuel tank temperature should read close to each other (both at ambient). The ECM detects an implausible spread, which usually means one of the two sensors drifts, is wired wrong, or has a heat source nearby that the plausibility model does not account for.
Is it safe to drive with P24F3?
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 drifting outside tolerance
- PossibleRecently active reductant tank heater warming the tank above ambient
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Tank Temperature Sensor, Fuel Tank Temperature Sensor
Related codes
- P24F0Control Module Wake-up Circuit Low
- P24F1Control Module Wake-up Circuit High
- P24F2EGR Temperature/Charge Air Cooler Temperature Correlation
- P24F4NOx Sensor Delayed Response - High to Low Bank 1 Sensor 1
- P24F5NOx Sensor Delayed Response - High to Low Bank 1 Sensor 2
- P24F6Exhaust Aftertreatment Fuel Air Purge Valve Stuck Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.