OBD-II code · Powertrain (generic, extended)
P2572 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
General electrical fault on the DOR catalyst deterioration sensor circuit. This sensor estimates the remaining ozone-conversion capacity of the DOR coating — coating worn off the radiator surface, contaminated by salt or grime, or thermally aged. Without a valid signal the deterioration monitor is disabled.
Is it safe to drive with P2572?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen or shorted wiring
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Dor Deterioration Sensor, Sensor Wiring
Related codes
- P256FA/C Request B Circuit Range/Performance
- P2570Direct Ozone Reduction Catalyst Temperature Sensor Circuit High
- P2571Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic
- P2573Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
- P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.