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.
Affected components
- Dor deterioration sensor
Common causes
- High likelihood: Aged sensor with offset drift
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
Possible symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.