Powertrain
generic / SAE
P2574
Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
The DOR deterioration sensor signal voltage reads below the lower limit — short to ground or internal short.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 74
Possible causes
- Signal wire shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–400 €
- Estimated time: 0.4–1.5 h
- Component: dor deterioration sensor
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012