OBD-II code · Powertrain (generic, extended)
P2575 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
The DOR deterioration sensor signal voltage reads above the upper limit — short to reference voltage or open signal return.
Is it safe to drive with P2575?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to reference voltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P2572Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
- P2573Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
- P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- P2576Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
- P2577Direct Ozone Reduction Catalyst Efficiency Below Threshold
- P2578Turbocharger/Supercharger Speed Sensor A Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.