P2569
Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low
Emissions (ozone reduction catalyst)
Generic OBD-II
Low
What it means
P2569 means the temperature sensor for the direct ozone reduction catalyst is reading an abnormally low voltage — typically a short to ground, wiring fault, or failed sensor. This catalyst (a radiator or exhaust coating that converts ozone) is monitored for emissions, so the fault affects a self-check rather than how the car drives.
Low
Can I keep driving? Fine to drive — this is an emissions-monitoring sensor fault. The engine runs normally; the code mainly affects an emissions self-check and readiness.
Common symptoms
What you'll notice
- Check-engine light on
- Emissions monitor not ready (may fail a state inspection)
- No noticeable change in how the engine runs
Common causes
Most likely first
- Faulty direct ozone reduction catalyst temperature sensorLikely
- Signal wire shorted to ground giving a low readingCommon
- Corroded or loose sensor connectorCommon
- Open or damaged wiring in the sensor circuitLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the low-circuit reading.
- Locate the ozone reduction catalyst temperature sensor and inspect its connector and wiring.
- Check for a short to ground and measure the sensor signal against spec.
- Repair damaged wiring or connectors.
- Replace the sensor if it is out of spec, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2569?+
Yes. It's an emissions-system sensor fault with no effect on how the engine runs — though it may keep an emissions monitor from completing for inspection.
Can I just clear P2569?+
It will set again once the ECM re-checks the circuit unless the sensor or wiring is repaired.
Related codes
Often seen with P2569
Read & clear P2569 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX