OBD-II code · Powertrain (manufacturer / generic)
P3471 Cylinder Deactivation Hydraulic Circuit Bank 2 Performance
The engine control module has detected a performance fault in the bank 2 hydraulic circuit used for cylinder deactivation. Oil pressure response or actuation timing falls outside the expected window during deactivation events on bank 2, often caused by viscosity issues, internal leaks or worn switching lifters.
Is it safe to drive with P3471?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIncorrect oil viscosity or aged oil
- PossibleSwitching lifter worn or sticking
- PossibleInternal oil leak in deactivation circuit
Repair at a glance
- Difficulty
- Shop_only
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–12 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oil Control Valve, Lifter, Engine Oil
Related codes
- P3467Cylinder Deactivation Hydraulic Circuit Bank 1 Performance
- P3468Cylinder Deactivation Hydraulic Circuit Bank 1 Low
- P3469Cylinder Deactivation Hydraulic Circuit Bank 1 High
- P3470Cylinder Deactivation Hydraulic Circuit Bank 2 Open
- P3472Cylinder Deactivation Hydraulic Circuit Bank 2 Low
- P3473Cylinder 9 Deactivation
- P3474Cylinder Deactivation Hydraulic Circuit Bank 2 High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.