Powertrain
generic / SAE
P047F
Exhaust Pressure Control Valve A Stuck Open
Exhaust pressure control valve A is mechanically stuck open — backpressure cannot be raised, exhaust brake and DPF regen support fail.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 7F
Possible causes
- Carbon buildup or broken return spring high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–1000 €
- Estimated time: 0.7–3.5 h
- Component: exhaust pressure regulator
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012