P3471
Cylinder Deactivation Hydraulic Circuit Bank 2 Performance
What it means
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?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Incorrect oil viscosity or aged oil
highOne of the most commonly reported causes for this code — check this first.
Switching lifter worn or sticking
mediumA plausible cause — test and verify before replacing parts.
Internal oil leak in deactivation circuit
mediumA plausible cause — test and verify before replacing parts.
Related help
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