Particulate Matter Sensor Temperature Circuit High

Where it lives

For P24C9, the circuit described runs through the sensor. The description of P24C9 reports a fault at the sensor.

Check these first

• A particulate matter sensor temperature signal wire shorted to voltage
• A failed particulate matter sensor temperature element
• High resistance in the temperature circuit ground
• A chafed particulate matter sensor harness

What to do next

1. Read the particulate matter sensor temperature on a scan tool
2. Test the temperature signal wire for a short to voltage
3. Check the temperature circuit ground for high resistance
4. Inspect the particulate matter sensor harness for chafe
5. Replace the particulate matter sensor if the circuit tests good
6. Clear the code and retest

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