Reductant Tank Temperature Sensor A Circuit

Where it lives

For P205A, the circuit described runs through the sensor. The description of P205A reports a fault at the sensor.

Check these first

• Reductant tank temperature sensor A failed or open
• An open or shorted wire in the sensor A circuit
• A short to ground dragging the sensor A signal
• Corrosion in the sensor A connector
• An ECM input fault on the sensor A circuit

What to do next

1. Read reductant tank temperature sensor A live data
2. Inspect the sensor A connector for corrosion
3. Test the sensor A circuit for opens and shorts to ground
4. Compare sensor A against ambient temperature
5. Replace reductant tank temperature sensor A if the reading is wrong
6. Clear the code and retest

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