OBD-II code · Powertrain (generic)
P05EE Reductant Pump Supply Voltage Circuit Open
The supply line that powers the AdBlue dosing pump is open. Without supply the pump cannot deliver reductant pressure - dosing is suspended and NOx emissions can drift out of compliance.
Is it safe to drive with P05EE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply open or relay defective
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.8–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Pump, Reductant Pump Supply Relay
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.