What does code P23C2 mean?

Q: What does code P23C2 mean?

NOx Sensor Delayed Response High to Low Bank 1 Sensor 3. P23C2 means the powertrain control module (PCM) commanded the bank 1 sensor 3 nitrogen oxide (NOx) sensor to switch its output from a high reading to a low reading and the sensor took too long to respond. The PCM monitors the sensor's response time during its self-test and sets this code when the transition exceeds the calibrated threshold.

DTC codes / P23xx · Ignition system and misfire / P23C2

P23C2NOx Sensor Delayed Response High to Low Bank 1 Sensor 3

P23C2 means the powertrain control module (PCM) commanded the bank 1 sensor 3 nitrogen oxide (NOx) sensor to switch its output from a high reading to a low reading and the sensor took too long to respond. The PCM monitors the sensor's response time during its self-test and sets this code when the transition exceeds the calibrated threshold.

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.