What does code P24D2 mean?

Q: What does code P24D2 mean?

Reductant Heater A Sense Circuit. P24D2 indicates that the powertrain control module (PCM) has detected an abnormal condition in the sense circuit for the reductant heater, which is part of the diesel exhaust fluid (DEF) system. The PCM monitors the heater circuit to ensure it can properly warm the DEF for injection, and this code sets when the voltage or current on the sense circuit falls outside the expected range.

DTC codes / P24xx · Auxiliary emission controls / P24D2

P24D2Reductant Heater A Sense Circuit

P24D2 indicates that the powertrain control module (PCM) has detected an abnormal condition in the sense circuit for the reductant heater, which is part of the diesel exhaust fluid (DEF) system. The PCM monitors the heater circuit to ensure it can properly warm the DEF for injection, and this code sets when the voltage or current on the sense circuit falls outside the expected range.

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.