Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low

Where it lives

For P2569, the circuit described runs through the sensor. The description of P2569 reports a fault at the sensor.

Check these first

• A direct ozone reduction catalyst temperature sensor reporting a low signal
• A short to ground in the catalyst temperature sensor circuit
• An open in the catalyst temperature sensor harness
• A poor connection at the catalyst temperature sensor connector

What to do next

1. Read the direct ozone reduction catalyst temperature sensor on a scan tool
2. Look for a short to ground in the sensor circuit
3. Inspect the sensor connector and wiring
4. Test the sensor circuit for open and short faults
5. Replace the catalyst temperature sensor if the low signal returns
6. Clear the code and retest

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