Reductant Quality Sensor Circuit High

Where it lives

For P206D, the circuit described runs through the sensor. The description of P206D reports a fault at the sensor.

Check these first

• An open in the reductant quality sensor signal wire
• A short to voltage on the quality sensor circuit
• A failed reductant quality sensor
• A poor quality sensor ground connection

What to do next

1. Read the reductant quality sensor on a scan tool
2. Test the quality sensor signal wire for an open
3. Test the quality sensor circuit for a short to voltage
4. Check the quality sensor ground connection
5. Replace the reductant quality sensor if the circuit tests good
6. Clear the code and retest

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