Powertrain
generic or reserved
P3479
Cylinder Deactivation Solenoid Bank 1 Control Circuit Open
The engine control module has detected an open circuit at the bank 1 cylinder deactivation solenoid. The solenoid routes oil pressure to the switching lifters; an open circuit prevents activation and the system disables deactivation requests on bank 1.
SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / 79
Possible causes
- Solenoid coil open high
- Wiring or connector open medium
- ECM driver failed low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 150–1100 €
- Estimated time: 1–5 h
- Component: cylinder deactivation solenoid
- Component: engine wiring harness
- Component: ecm
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012