What does code P24FE mean?

Q: What does code P24FE mean?

SCR Catalyst Incorrect. P24FE indicates that the powertrain control module has determined the selective catalytic reduction catalyst is not reducing nitrogen oxides as efficiently as expected, based on the upstream and downstream nitrogen oxide sensor signals. The computer compares the expected drop in nitrogen oxides across the catalyst to the measured drop and sets this code when the performance falls outside the calibrated threshold.

DTC codes / P24xx · Auxiliary emission controls / P24FE

P24FESCR Catalyst Incorrect

P24FE indicates that the powertrain control module has determined the selective catalytic reduction catalyst is not reducing nitrogen oxides as efficiently as expected, based on the upstream and downstream nitrogen oxide sensor signals. The computer compares the expected drop in nitrogen oxides across the catalyst to the measured drop and sets this code when the performance falls outside the calibrated threshold.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.