OBD-II code · Powertrain (generic, extended)
P20EA Reductant Pump Control Circuit Open
The control circuit to the reductant (DEF) dosing pump is open — no current flow detected. Without pump pressure no AdBlue reaches the SCR catalyst and NOx reduction stops.
Is it safe to drive with P20EA?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyPump motor open
- PossibleConnector unplugged or corroded
- Less likelyPin pushed back out of connector body
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Reductant Pump, Reductant Pump Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.