OBD-II code · Powertrain (generic, extended)
P2576 Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
The DOR deterioration sensor signal jumps or drops out — typically loose connectors or chafed wiring near the radiator.
Is it safe to drive with P2576?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLoose connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
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
- 0.3–1 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
- P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
- P2577Direct Ozone Reduction Catalyst Efficiency Below Threshold
- P2578Turbocharger/Supercharger Speed Sensor A Circuit
- P2579Turbocharger/Supercharger Speed Sensor A Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.