Lost Communication With Particulate Matter Sensor

Where it lives

For U02A3, start at the sensor the description names.

Check these first

• A damaged or disconnected harness to the particulate matter sensor
• A failed particulate matter sensor
• Corrosion at the sensor connector
• A fault in the ECM blocking the sensor signal
• A software glitch in the control module

What to do next

1. Inspect the wiring and connector at the particulate matter sensor
2. Check the sensor signal on a scan tool
3. Verify the module reads the sensor
4. Update the control module software
5. Replace the particulate matter sensor if it does not respond
6. Clear the code and retest

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