Direct Ozone Reduction Catalyst Temperature Sensor Circuit

Where it lives

For P2567, the circuit described runs through the sensor. The description of P2567 reports a fault at the sensor.

Check these first

• An open or short in the direct ozone reduction catalyst temperature sensor circuit
• A failed direct ozone reduction catalyst temperature sensor
• Corrosion at the catalyst temperature sensor connector
• Chafed wiring along the catalyst temperature sensor harness

What to do next

1. Read the direct ozone reduction catalyst temperature sensor on a scan tool
2. Test the catalyst temperature sensor circuit for open and short faults
3. Check the catalyst temperature sensor connector pins
4. Verify reference voltage at the catalyst temperature sensor
5. Replace the direct ozone reduction catalyst temperature sensor if faulty
6. Clear the code and retest

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