Powertrain
generic / SAE
P2656
A Rocker Arm Actuator System Performance/Stuck Off Bank 2
The rocker arm actuator A on bank 2 is commanded to engage but does not switch. Engine stays in the wrong lift mode under load on this bank.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / 56
Possible causes
- Low oil pressure cannot move the actuator high
- Mechanical lock pin stuck in unactivated position medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1800 €
- Estimated time: 1.5–5.5 h
- Component: rocker arm actuator a b2
- Component: oil control valve
- Component: oil supply
- MIL / check engine light
Sources
References
sae:J2012