Powertrain
generic / SAE
P2BA7
NOx Exceedence - Empty Reagent Tank
NOx emissions are above the legal threshold and the ECU isolates the cause to an empty reductant tank. SCR cannot dose AdBlue/DEF.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberB / A7
Possible causes
- DEF/AdBlue tank empty - refill required high
- Level sensor reads empty incorrectly medium
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: 200–2000 €
- Estimated time: 1–8 h
- Component: reductant tank
- Component: reductant level sensor
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012