P341B code meaning
Deactivation/Intake Valve Control Circuit Performance Bank 2
Powertrain system Generic code P34xx codes Check engine light
What P341B means
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.
P341B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 12 hours
- Clears after repairAfter a drive cycle
Symptoms of P341B
- Check engine lamp on
- Rough running, mostly at light load
- Misfire codes on bank 2
Common causes of P341B
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cylinder deactivation solenoidLifterEngine oil
What each part of P341B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 3 | Mixed range: generic and manufacturer-specific codes. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 1B | The exact fault in that area. |
What to do next
- Note P341B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P341B
What does P341B mean?
P341B means "Deactivation/Intake Valve Control Circuit Performance Bank 2". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P341B?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P341B fail an emissions test?
Yes, it can. P341B is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P341B to fix?
Difficulty: hard. A typical repair takes 0.5 to 12 hours of work. This is a job for a workshop.
Will P341B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.