Reductant Pump Motor Position Sensor Circuit High

Where it lives

For P2AD9, the circuit described runs through the sensor. The description of P2AD9 reports a fault at the sensor.

Check these first

• An open in the reductant pump motor position sensor signal circuit
• A failed reductant pump motor position sensor reading high
• A pump sensor connector pin backed out
• A pump motor that stalls and freezes the position signal at the top

What to do next

1. Scan all modules and read the reductant pump motor position sensor voltage
2. Inspect the pump sensor connector for a backed out or spread pin
3. Test the pump motor position sensor circuit for an open
4. Command the pump motor and confirm the position signal moves
5. Replace the reductant pump assembly if the signal stays high
6. Clear the code and retest

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