Powertrain
generic / SAE
P26FC
EGR Cooler Bypass Control Stuck Closed Bank 2
The EGR cooler bypass valve on bank 2 is stuck in the closed position. EGR gas always passes through the cooler, slowing engine warm-up and degrading cold-start emissions.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / FC
Possible causes
- Valve flap seized closed by soot high
- Actuator linkage jammed in closed position medium
- Carbon or debris buildup preventing free movement low
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 250–1800 €
- Estimated time: 1.5–5.5 h
- Component: egr cooler bypass valve b2
- Component: bypass actuator
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012