What does code P2573 mean?

DTC codes / P25xx · Vehicle speed, idle control and auxiliary inputs / P2573

P2573Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance

P2573 indicates that the powertrain control module (PCM) has detected an out-of-range or performance fault in the circuit for the direct ozone reduction catalyst deterioration sensor. This sensor monitors the condition of the catalyst that reduces ozone, and the PCM sets the code when the sensor signal does not behave as expected under normal operating conditions.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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