P05F0
Reductant Pump Supply Voltage Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the fuse for the reductant pump supply voltage circuit
- Inspect and clean the electrical connections related to the reductant pump
- Replace the reductant pump if it is found to be faulty or damaged
- Reset the vehicle's onboard computer system to clear any stored error codes
Common causes
Most likely first
- Faulty reductant pump
- Malfunctioning reductant pump control module
- Short circuit or open circuit in the reductant pump supply voltage circuit
- Blown fuse related to the reductant pump
- Wiring or connection issues in the reductant pump supply voltage circuit
How to diagnose & fix
Work through it in order
- Check engine light illuminated on the dashboard
- Decreased engine performance or power loss
- Increased fuel consumption
- Difficulty starting the vehicle
- Rough engine idle or stalling
Read & clear P05F0 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.