Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low

Where it lives

For P2574, the circuit described runs through the sensor. The description of P2574 reports a fault at the sensor.

Check these first

• A short to ground on the catalyst deterioration sensor circuit
• An open in the catalyst deterioration sensor wiring
• A failed direct ozone reduction catalyst deterioration sensor
• Low battery voltage weakening the sensor signal

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 a short to ground
3. Check the catalyst deterioration sensor wiring for an open
4. Check battery voltage and connections
5. Replace the direct ozone reduction catalyst deterioration sensor if the circuit tests good
6. Clear the code and retest

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