Powertrain
generic / SAE
P2570
Direct Ozone Reduction Catalyst Temperature Sensor Circuit High
The DOR catalyst temperature sensor reads stuck high — short to reference voltage or open signal return. Without a valid temperature the ECM cannot enable the DOR efficiency monitor.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 70
Possible causes
- Signal wire shorted to reference voltage high
- Open signal return medium
- Connector pins corroded - high contact resistance 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 temperature sensor
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012