Direct Ozone Reduction Catalyst Deterioration Sensor Circuit

Where it lives

For P2572, the circuit described runs through the sensor. The description of P2572 reports a fault at the sensor.

Check these first

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

What to do next

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

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