P341BDeactivation/Intake Valve Control Circuit Performance Bank 2
- 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
- With P341B the controller judges that intake deactivation on bank 2 is not doing its job even though no circuit fault is present: cylinders keep breathing when they should be sealed, or stay sealed after reactivation. No manufacturer documents this code publicly. One way to catch it is described in a Delphi patent: pressure pulses in the intake are timed against crank angle, and a missing or extra pulse shows which cylinder misbehaves. In practice, makers use their own codes instead, such as GM's P3498 series per cylinder or Honda's bank code P3497. CARB requires a functional check of such outputs. Electrical faults on the same bank are P340B; bank 1 is P341A. Oil level and quality are the first things to check.
- What you may notice
- Check engine lamp on
- Rough running, mostly at light load
- Misfire codes on bank 2
- Likely causes
- LikelyOil level too low or oil past its service life
- PossibleLifter or rocker on bank 2 stuck in one switching state
- PossibleControl valve on bank 2 sticking or leaking past its seal
- 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.