Reductant Tank Temperature Sensor A Circuit Intermittent/Erratic

Where it lives

For P205E, the circuit described runs through the sensor. The description of P205E reports a fault at the sensor.

Check these first

• A loose reductant tank temperature sensor A connector
• Water intrusion in the tank sensor A connector
• Intermittent chafing on the sensor A harness
• A failing tank sensor A that drops signal at times

What to do next

1. Read reductant tank temperature sensor A while wiggling the harness
2. Inspect the sensor A connector for water or corrosion
3. Test the sensor A circuit for intermittent opens
4. Check the sensor A ground for a voltage drop
5. Replace the reductant tank temperature sensor A if the fault repeats
6. Clear the code and retest

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