Powertrain
generic / SAE
P203F
Reductant Level Too Low
The DEF tank level has dropped below the warning threshold — driver action required to refill before the inducement strategy escalates to limp mode or no-restart.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 3F
Possible causes
- DEF tank simply empty — refill needed high
- Level sensor under-reading low
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: easy
- DIY: possible
- Estimated cost: 10–60 €
- Estimated time: 0.1–0.3 h
- Component: reductant tank
- Component: reductant level sensor
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012