Powertrain
generic / SAE
P2BA8
NOx Exceedence - Interruption of Reagent Dosing Activity
NOx emissions are above the legal threshold and the ECU isolates the cause to interruption of reductant dosing. The injection valve, pump, or supply line is impaired.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberB / A8
Possible causes
- Reductant injection valve clogged high
- Reductant pump output insufficient 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 injection valve
- Component: reductant pump
- Component: scr module
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012