Powertrain
generic / SAE
P04DA
Closed Loop EGR Control At Limit Flow Too High
Same as P04D9 with the controller fully closing the actuator yet still measuring more EGR flow than required. The valve does not seat fully, or position feedback under-reads.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / DA
Possible causes
- Valve does not seat fully (debris or wear) high
- Position sensor offset medium
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: 300–1500 €
- Estimated time: 1.5–5 h
- Component: egr valve a
- Component: egr position sensor a
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012