OBD-II DTC · SAE J2012

P2573

Direct Ozone Reduction Catalyst Deterioration Sensor Circ Range/Perf4

Catalyst → Suppressible (off-road only)

What P2573 means

P2573 is a standard SAE J2012 powertrain diagnostic trouble code with the defined meaning: Direct Ozone Reduction Catalyst Deterioration Sensor Circ Range/Perf4. This is the OEM-agnostic definition; specific manufacturer interpretation may add detail (subsystem, bank, sensor location) but the core meaning is consistent across all OBD-II compliant vehicles since 1996.

Can this code be suppressed via ECU tuning?

Suppressible at the calibration level. Required when fitting a de-cat downpipe or running a leaner catalyst. Off-road only.

Related codes in the P25xx family

P2500P2501P2502P2503P2504P2505P2506P2507P2508P2509P2510P2511

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