Powertrain
generic or reserved
P3466
Cylinder Deactivation Hydraulic Circuit Bank 1 Open
The engine control module has detected an open hydraulic circuit in the cylinder deactivation system on bank 1. The system uses pressurized engine oil routed through dedicated lifters and oil control valves to collapse valves; an open circuit indicates loss of oil flow or a failed pressure switch.
SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / 66
Possible causes
- Oil pressure switch failed high
- Oil passage blocked or sludge buildup medium
- Oil control valve stuck medium
Inspection / repair
- Difficulty: shop only
- DIY: shop recommended
- Estimated cost: 300–2000 €
- Estimated time: 2–10 h
- Component: oil control valve
- Component: oil pressure switch
- Component: lifter
- Component: engine oil passage
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012