Powertrain
generic / SAE
P049C
EGR B Flow Excessive Detected
Same as P049A but with measured flow above the required rate - typically EGR valve sticking open or position sensor offset low.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 9C
Possible causes
- EGR valve B sticking open high
- Position sensor reads low 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 b
- Component: egr position sensor b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012