Powertrain
generic / SAE
P05EB
Cold Start SCR NOx Catalyst Inlet Temperature Too Low
Same as P22FF but specifically during the cold-start window - the SCR catalyst inlet temperature does not reach the threshold needed for NOx reduction in the cold-start phase, so reductant injection cannot be enabled.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / EB
Possible causes
- Heat-up strategy not bringing exhaust to temp 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: medium
- DIY: shop recommended
- Estimated cost: 200–800 €
- Estimated time: 1–3 h
- Component: scr inlet temperature sensor
- Component: scr catalyst
- Component: exhaust heat management
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012