Reductant Pump Motor Position Sensor Circuit Low

Where it lives

For P2AD8, the sensor sits on the circuit this code reports. The description of P2AD8 reports a fault at the sensor.

Check these first

• A short to ground on the reductant pump motor position sensor signal wire
• A failed reductant pump motor position sensor
• A chafed pump sensor harness grounded on the DEF tank
• Water in the pump motor position sensor connector

What to do next

1. Scan all modules and read the reductant pump motor position sensor voltage
2. Inspect the pump sensor harness and connector for chafing or water
3. Test the pump motor position sensor signal wire for a short to ground
4. Rotate the reductant pump by hand and watch the position signal change
5. Replace the reductant pump if the signal stays low with the harness clear
6. Clear the code and retest

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