Reductant Pump Supply Voltage Circuit Stuck Off

Where it lives

For P05F2, the pump sits on the circuit this code reports. The description of P05F2 reports a fault at the pump.

Check these first

• An open in the reductant pump supply voltage wire
• A blown fuse feeding the reductant pump
• A failed reductant pump
• Corrosion at the pump connector
• A faulty ECM driver for the pump supply

What to do next

1. Check the fuse and supply voltage at the reductant pump
2. Inspect the pump connector and wiring for damage
3. Command the pump on with a scan tool and watch supply voltage
4. Test the supply circuit for an open
5. Replace the reductant pump if voltage is present but it does not run
6. Clear the code and retest

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