OBD-II code · Powertrain (generic, extended)
P2569 Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low
Direct Ozone Reduction (DOR) catalysts are coated radiator surfaces or dedicated catalysts that decompose tropospheric ozone passing over the radiator — used for low-emissions vehicles. The temperature sensor monitoring the DOR brick reads stuck low — short to ground or sensor short.
Is it safe to drive with P2569?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- PossibleSensor shorted internally
- Less likelyConnector pins corroded - high contact resistance
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
- 0.4–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Dor Temperature Sensor, Sensor Wiring
Related codes
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- P2567Turbocharger Boost Control Position Sensor Circuit Low
- P2568Turbocharger Boost Control Position Sensor Circuit High
- P256AEngine Idle Speed Selector Sensor/Switch Circuit/Open
- P256BEngine Idle Speed Selector Sensor/Switch Range/Performance
- P256CEngine Idle Speed Selector Sensor/Switch Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.