Powertrain
generic / SAE
P049E
EGR B Control Position Exceeded Learning Limit
The ECU continuously learns offsets for the EGR A actuator to compensate for soot buildup and ageing. The learned correction has reached its software-side maximum (or minimum) and cannot trim further - the underlying mechanical drift exceeds the design margin.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 9E
Possible causes
- Heavy carbon deposits on EGR B seat high
- Actuator gearing worn 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: 300–1200 €
- Estimated time: 1.5–4 h
- Component: egr valve b
- Component: egr position sensor b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012