What does code P24EB mean?

Q: What does code P24EB mean?

NH3 Sensor Supply Voltage Circuit Low. P24EB indicates that the powertrain control module has detected a low voltage condition on the supply circuit feeding the ammonia (NH3) sensor, which is used in selective catalytic reduction systems to monitor ammonia slip. The computer compares the supply voltage to an expected range and sets the code when the signal falls below the calibrated threshold, typically because of a wiring fault, poor connection, or a failing sensor.

DTC codes / P24xx · Auxiliary emission controls / P24EB

P24EBNH3 Sensor Supply Voltage Circuit Low

P24EB indicates that the powertrain control module has detected a low voltage condition on the supply circuit feeding the ammonia (NH3) sensor, which is used in selective catalytic reduction systems to monitor ammonia slip. The computer compares the supply voltage to an expected range and sets the code when the signal falls below the calibrated threshold, typically because of a wiring fault, poor connection, or a failing sensor.

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.