What does code P23BC mean?

Q: What does code P23BC mean?

NOx Sensor Calibration Memory Bank 1 Sensor 3. P23BC indicates that the powertrain control module has detected a fault in the calibration memory of the nitrogen oxide sensor located after the selective catalytic reduction system on bank 1, sensor 3. The sensor's internal calibration data, which is used to accurately convert the measured NOx concentration into a signal, is either corrupted, out of range, or cannot be read reliably by the module.

DTC codes / P23xx · Ignition system and misfire / P23BC

P23BCNOx Sensor Calibration Memory Bank 1 Sensor 3

P23BC indicates that the powertrain control module has detected a fault in the calibration memory of the nitrogen oxide sensor located after the selective catalytic reduction system on bank 1, sensor 3. The sensor's internal calibration data, which is used to accurately convert the measured NOx concentration into a signal, is either corrupted, out of range, or cannot be read reliably by the module.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.