OBD-II code P3482 indicates that the Powertrain Control Module (PCM) has detected a performance fault in the intake valve control circuit for cylinder 11, which is typically associated with a variable valve timing (VVT), cylinder deactivation, or electro-hydraulic variable lift system. The engine is usually a V-configuration with at least 11 cylinders (e.g., V12) since this code is only meaningful for engines that have a 12th cylinder. The PCM is monitoring the electrical solenoid or actuator that controls intake valve operation, and the signal has fallen outside expected parameters.
The most common cause is a failed or sticking solenoid that controls oil flow to the variable valve timing or cylinder deactivation actuator on cylinder 11. These solenoids are exposed to heat and contaminated oil and wear out over time.
Variable valve timing and many cylinder deactivation systems rely on clean engine oil at the correct pressure to actuate the mechanisms. Low oil level, overdue oil changes, or sludge can prevent proper valve control operation and trigger this code.
Open, shorted, or corroded wiring and connectors between the PCM and the intake valve control solenoid/actuator are a frequent source of performance faults. Heat cycling and engine movement cause harness fatigue over time.
Mechanical failure of the phaser, solenoid-actuated valve, or lift mechanism on cylinder 11 can cause the electrical circuit to report a performance deviation even when the solenoid itself functions.
A failing oil control valve, clogged oil passages, or a weak oil pump can prevent proper hydraulic pressure from reaching the cylinder 11 actuator, setting this code even with a good solenoid.
A software calibration error or internal failure of the engine control module can theoretically cause this code, but this is the least common cause. A software reflash or PCM replacement should only be considered after all other causes have been ruled out.
Short-term driving is often possible, but performance, fuel economy, and emissions will be affected. Continuing to drive with a known valve control fault can lead to additional engine wear or damage, so repair should be done promptly.
No. Although parts sellers or less experienced shops may suggest a PCM replacement, the actual problem is almost always the valve control solenoid, oil condition, or wiring. PCM failure is one of the least likely causes and should only be considered after all other possibilities have been thoroughly tested.
Yes. Many variable valve timing and cylinder deactivation systems depend on clean, pressurized oil to operate correctly. A simple oil and filter change sometimes resolves P3482 if the oil was the underlying issue.
P3482 is a cylinder-specific code, meaning the PCM has identified a performance deviation on the intake valve control circuit serving only cylinder 11. The same fault on a different cylinder would produce a different code number (e.g., P3480 for cylinder 10, P3484 for cylinder 12).