P3482Cylinder 11 Deactivation/Intake Valve Control Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P3482 is the functional check for cylinder 11: the actuator circuit is electrically fine, but the cylinder does not actually go dormant or wake up when told to. No manufacturer documents this code publicly; J2012 reserves the codes for cylinders 9 to 12 for engines with more than eight cylinders. Bentley's Bentayga and Continental W12 can run on six of twelve cylinders, yet the published description has the valves keep working, so a valve-switching failure cannot arise there. Engines that do close valves rely on oil pressure acting on switching lifters, as NHTSA's review of GM's lifter design lays out in detail; contaminated or low oil and worn locking pins are the usual reasons for a missed switch. The electrical counterparts on cylinder 11 are P3481, P3483 and P3484.
- What you may notice
- Check engine lamp on
- Misfire on cylinder 11 (P0311)
- Noticeable shudder when switching modes
- Likely causes
- LikelyContaminated or insufficient oil for switching cylinder 11
- PossibleWorn or sticking locking pins at cylinder 11
- PossibleOil screen to the cylinder 11 actuator clogged
- RareActuator seal leaking pressure
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.