What does code P24FF mean?

Q: What does code P24FF mean?

Reductant Temperature Too High. P24FF indicates that the reductant temperature sensor circuit has reported a temperature above the manufacturer's safe threshold, typically for a calibrated time period. The engine control module (ECM) monitors this sensor to protect the diesel exhaust fluid (DEF) system from overheating, which can degrade the fluid and damage components.

DTC codes / P24xx · Auxiliary emission controls / P24FF

P24FFReductant Temperature Too High

P24FF indicates that the reductant temperature sensor circuit has reported a temperature above the manufacturer's safe threshold, typically for a calibrated time period. The engine control module (ECM) monitors this sensor to protect the diesel exhaust fluid (DEF) system from overheating, which can degrade the fluid and damage components.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.