Powertrain
generic or reserved
P3478
Cylinder Deactivation Oil Pressure Switch Bank 2 Performance
The engine control module has detected a rationality fault between commanded oil pressure and the bank 2 cylinder deactivation oil pressure switch state. The switch fails to change state at the expected pressure threshold during deactivation transitions on bank 2.
SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / 78
Possible causes
- Pressure switch sticky or contaminated high
- Oil control valve slow to respond medium
- Low system oil pressure low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 120–1000 €
- Estimated time: 1–5 h
- Component: oil pressure switch
- Component: oil control valve
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012