Powertrain
generic / SAE
P04DE
Cold Start EGR A Flow Excessive Detected
Same as P04DD with EGR flow above the cold-start target - typically valve sticking open during the cold phase or position sensor offset low.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / DE
Possible causes
- EGR valve A sticking open when cold high
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 250–1200 €
- Estimated time: 1.5–4 h
- Component: egr valve a
- Component: egr position sensor a
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012