P34A2Cylinder 11 Deactivation/Intake Valve 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
- P34A2 names a mechanical deactivation fault on cylinder 11: the valves continued to operate although the cylinder had been switched off. No manufacturer documents this code publicly. The nearest production example is the Active Cylinder Control that Mercedes fitted to the 5.8 l V12 of the CL 600 and S 600 from 2001; it idled one bank and uncoupled its exhaust valves by means of two solenoids; a stuck switching element there would produce exactly the fault this code describes. For eight-cylinder engines GM uses P3498 to P349F, judged by manifold pressure and stored as Type B after 22 failures in 25 checks. P3482 is the control-performance code for cylinder 11, and a misfire there would be P0311.
- What you may notice
- Check engine lamp on
- Rough running when one bank is shut down
- Higher fuel use
- Likely causes
- LikelyValve switching element of cylinder 11 jammed
- PossibleOil pressure supply to the switching parts disturbed
- RareLow or degraded oil
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.