Reductant Quality Sensor Circuit

Where it lives

For P206A, the sensor sits on the circuit this code reports. The description of P206A reports a fault at the sensor.

Check these first

• A failing reductant quality sensor
• Contaminated or diluted reductant in the tank
• A low reductant level
• Damaged wiring or a corroded connector at the quality sensor
• The wrong reductant type in the system

What to do next

1. Check the reductant level and top off the tank
2. Inspect the reductant quality sensor wiring and connector
3. Test the quality sensor circuit for opens and shorts
4. Read reductant quality data with a scan tool
5. Replace the reductant quality sensor if the reading is fixed or erratic
6. Clear the code and retest

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