P05EEReductant Pump Supply Voltage Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The electric supply pump in the diesel exhaust fluid (DEF, AdBlue) tank module builds the dosing pressure for the SCR catalyst. Its supply voltage is monitored separately from the pump control circuit (P208A ff); CARB requires SCR components and their outputs to be checked for circuit faults and function. P05EE means the supply circuit is open: when the supply is switched on, no voltage or current reaches the pump branch. Ford's comparable check flags a pump controller voltage below 6 V. Chrysler (FCA) lists this code among those that trigger the DEF inducement: a 'Service DEF System' warning, a countdown after 50 miles and no restart after 150 miles (P241D). Without supply the pump cannot build pressure, dosing stops and NOx rises; pressure or SCR efficiency codes may follow.
- What you may notice
- Check engine light on
- DEF/AdBlue warning, possibly countdown to no-restart
- Follow-up codes for low DEF pressure or SCR efficiency
- Likely causes
- LikelyConnector at the pump or tank module corroded or loose
- PossibleOpen wire in the harness to the tank
- PossibleFuse or relay of the pump supply faulty
- RarePump or tank module open internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.