OBD-II code · Powertrain (generic, extended)
P20FE Reductant Metering Unit 1 Performance
The first DEF metering unit (the integrated module that combines pump, filter, level sensor, and dosing valve) is electrically OK but does not deliver the expected pressure or flow during operation.
Is it safe to drive with P20FE?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyMetering unit aged or partially clogged
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
- 1.5–5 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Metering Unit
Related codes
- P2EADReductant Metering Unit 2 Performance
- P20FBReductant Pump B Control Performance/Stuck Off
- P20FCReductant Pump B Control Circuit Low
- P20FDReductant Pump B Control Circuit High
- P20FFReductant Control Module Performance
- P2100Throttle Actuator Control Motor Circuit Open
- P2101Throttle Actuator Control Motor Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.