What does code P24E5 mean?

Q: What does code P24E5 mean?

NH3 Sensor Circuit Intermittent/Erratic. P24E5 indicates that the powertrain control module has detected an intermittent or erratic signal from the ammonia (NH3) sensor circuit, which is used on diesel vehicles with selective catalytic reduction to monitor ammonia slip. The computer expects a stable, predictable voltage or current from the sensor, and when the signal jumps, drops out, or behaves erratically beyond a calibrated window, this code is stored.

DTC codes / P24xx · Auxiliary emission controls / P24E5

P24E5NH3 Sensor Circuit Intermittent/Erratic

P24E5 indicates that the powertrain control module has detected an intermittent or erratic signal from the ammonia (NH3) sensor circuit, which is used on diesel vehicles with selective catalytic reduction to monitor ammonia slip. The computer expects a stable, predictable voltage or current from the sensor, and when the signal jumps, drops out, or behaves erratically beyond a calibrated window, this code is stored.

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.