OBD-II code · Powertrain (generic, extended)
P2573 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
The DOR deterioration sensor is electrically intact but its readings drift or do not match the model — for example a deterioration value that does not move with km/h driven, or moves implausibly fast.
Is it safe to drive with P2573?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAged sensor with offset drift
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
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
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Dor Deterioration Sensor
Related codes
- P2572Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
- P2570Direct Ozone Reduction Catalyst Temperature Sensor Circuit High
- P2571Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic
- P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
- P2576Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.