Reductant Temperature Sensor A Circuit Low

Where it lives

For P2044, the circuit described runs through the sensor. The description of P2044 reports a fault at the sensor.

Check these first

• A reductant temperature sensor A reporting a low signal
• A short to ground in the reductant temperature sensor A circuit
• An open in the reductant temperature sensor A harness
• A poor connection at the reductant temperature sensor A connector

What to do next

1. Read the reductant temperature sensor A on a scan tool
2. Look for a short to ground in the sensor circuit
3. Inspect the reductant temperature sensor A connector and wiring
4. Test the sensor circuit for open and short faults
5. Replace the reductant heater and sender assembly if the sensor tests bad
6. Clear the code and retest

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