Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / FE
Possible causes
- Metering unit aged or partially clogged high
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)
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–3000 €
- Estimated time: 1.5–5 h
- Component: reductant metering unit
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012