P24F3
Reductant Tank Temperature/Fuel Temperature Correlation
What it means
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?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
One temperature sensor drifting outside tolerance
highOne of the most commonly reported causes for this code — check this first.
Recently active reductant tank heater warming the tank above ambient
mediumA plausible cause — test and verify before replacing parts.
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