Powertrain
generic / SAE
P214B
SCR NOx Catalyst Inlet Temperature Too High During Particulate Filter Regeneration
Specifically during DPF regeneration, the SCR inlet temperature exceeded the safe limit — typically because too much HC was injected upstream or because the regeneration ran too long.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 4B
Possible causes
- HC dosing overshot during regeneration high
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–4000 €
- Estimated time: 1.5–8 h
- Component: scr catalyst
- Component: aftertreatment fuel injector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012