What does code P24E6 mean?

Q: What does code P24E6 mean?

NH3 Sensor Heater Circuit/Open. P24E6 indicates that the powertrain control module has detected an open circuit in the heater element of the ammonia (NH3) sensor, which is used to monitor selective catalytic reduction (SCR) system performance on diesel vehicles. The computer commands the heater on and monitors the current flow; when the expected current is absent, it sets this code because the sensor cannot reach operating temperature.

DTC codes / P24xx · Auxiliary emission controls / P24E6

P24E6NH3 Sensor Heater Circuit/Open

P24E6 indicates that the powertrain control module has detected an open circuit in the heater element of the ammonia (NH3) sensor, which is used to monitor selective catalytic reduction (SCR) system performance on diesel vehicles. The computer commands the heater on and monitors the current flow; when the expected current is absent, it sets this code because the sensor cannot reach operating temperature.

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.