Powertrain
generic / SAE
P2577
Direct Ozone Reduction Catalyst Efficiency Below Threshold
The DOR catalyst no longer reduces tropospheric ozone with the required efficiency, based on the deterioration sensor and operating-time model. Coating worn off the radiator surface, contaminated by road salt and grime, or thermally aged after many heat cycles. Replacing the affected radiator/coating restores function.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 77
Possible causes
- DOR coating worn off the radiator high
- Coating contaminated by salt and grime medium
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–1800 €
- Estimated time: 1.5–4 h
- Component: dor catalyst
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012