Powertrain
generic or reserved
P3490
Cylinder Deactivation System Performance Bank 1
The engine control module has detected that the cylinder deactivation system on bank 1 is not performing as expected. Closed-loop monitoring of pressure response, valve timing or misfire counters during transitions indicates the system fails to deactivate or reactivate cylinders within calibrated limits.
SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / 90
Possible causes
- Switching lifter stuck or worn high
- Insufficient oil pressure medium
- Solenoid slow or contaminated medium
Inspection / repair
- Difficulty: shop only
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 3–12 h
- Component: cylinder deactivation solenoid
- Component: lifter
- Component: oil control valve
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012