Invalid Data Received From Direct Ozone Reduction Catalyst Temperature Sensor

Where it lives

For U049E, the description names the sensor as the part involved.

Check these first

• Loss of power or ground at the Direct Ozone Reduction Catalyst Temperature Sensor
• A defective Direct Ozone Reduction Catalyst Temperature Sensor
• An internal failure of the Direct Ozone Reduction Catalyst Temperature Sensor
• Damaged or shorted wiring at the Direct Ozone Reduction Catalyst Temperature Sensor
• Corroded or damaged pins at the Direct Ozone Reduction Catalyst Temperature Sensor connector

What to do next

1. Scan every module and record the stored codes
2. Check the Direct Ozone Reduction Catalyst Temperature Sensor connector for water, corrosion, or loose pins
3. Check the Direct Ozone Reduction Catalyst Temperature Sensor circuit for opens and shorts
4. Verify power and ground at the Direct Ozone Reduction Catalyst Temperature Sensor
5. Replace the Direct Ozone Reduction Catalyst Temperature Sensor if the wiring and voltage tests pass
6. Clear the code and retest

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