P341ADeactivation/Intake Valve Control Circuit Performance Bank 1
- 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
- P341A is the function check behind P340A: the bank 1 intake deactivation circuit is electrically sound, yet the valves do not end up where they were commanded. No manufacturer documents this code publicly. Comparable checks exist under other numbers. GM's LT4 compares a modeled and a measured manifold pressure with and without deactivation and reports the bank result as P3400; per-cylinder failures on DFM engines go to P3498 onward. A Delphi patent notes why averaged manifold pressure alone separates working and failed intake deactivation poorly and cannot name the cylinder. Typical causes are hydraulic: low or dirty oil, a sticking control valve, lifters that do not latch. Misfires and rough running are possible.
- What you may notice
- Check engine lamp on
- Jerk or vibration when cylinders switch off or on
- Misfire codes on bank 1
- Likely causes
- LikelyLow oil level or aged, contaminated oil
- PossibleBank 1 deactivation control valve sticking or screen blocked
- PossibleSwitchable lifters or rockers on bank 1 not latching or releasing
- RareInsufficient oil pressure from a worn pump or leaking 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.