Generic fault code
P341A — Deactivation/intake valve (bank 1), control circuit: performance
The control unit stores code P341A when it detects this fault: “Deactivation/intake valve (bank 1), control circuit: performance”.
Indicative severity: MediumEngine (mechanical, cooling and lubrication)
Reviewed by Daniel Morales, founder of Reprorace SL, on
What does code P341A mean?
The engine's mechanics, timing (camshaft and crankshaft), cooling and lubrication. Many of these codes check that the engine is in time and at the right temperature.
- System
- P · Powertrain
- Area
- Engine (mechanical, cooling and lubrication) · Car system: Engine and lubrication
- Type
- Generic (SAE J2012 / ISO 15031-6): the same meaning on every make
- Indicative severity
- Medium. Diagnose soon: it may raise emissions or consumption, or trigger limp-home mode.
What usually causes code P341A?
- Incorrect fluid level or quality (oil, coolant, fuel, reductant)
The most likely causes come first. Only a check on the car confirms which one is yours.
What are the symptoms of code P341A?
- Vibrations or a rough engine at a steady speed
- Higher fuel use: the engine stops deactivating cylinders
- Check-engine light on
These are the usual symptoms of this kind of fault: not all of them always appear, and sometimes you notice nothing.
Can I keep driving with code P341A?
With care, and not for long. You can take the car to a workshop, ideally without long trips or heavy loads, and without putting it off: fuel use or emissions may rise and the car may go into limp-home mode (less power). If the light flashes, a red warning light comes on, the temperature rises or you notice a loss of power, noises or smoke, stop as soon as it is safe.
This is guidance only: only someone who checks the car can say whether it is safe to drive.
An indicative description of the code's generic meaning. Each manufacturer may give it a different meaning, conditions or tests: always follow its service information and your workshop's advice.
What you can do yourself
For this kind of fault
Cylinder deactivation works with oil pressure: check the level, use the oil your manual asks for and do not delay the oil change. If you hear the engine ticking or knocking, book the workshop soon.
Read the code and keep the report: with an ECO-LITE in the OBD socket you see it on your phone or computer, with the data captured when the fault happened.
Look for anything obvious: a loose connector, a disconnected hose, a fuel cap not closed properly or a low fluid level. Do not take apart anything you do not know.
Clear the code only after writing it down or after the repair. Clearing turns the light off, but it also deletes the freeze-frame data and the readiness monitors used at the inspection.
Drive normally for a few days and read the codes again. If the code comes back, the fault is still there: book the workshop and bring the report.
Read your car's fault codes on your phone
With an ECO-LITE in the OBD socket you see the codes in your account, with the data captured when the fault happened, and your workshop can check them remotely, always with your permission.
Related codes
- P3417Cylinder 3 deactivation/intake valve, control circuit open
- P3418Cylinder 3 deactivation/intake valve, control circuit: performance
- P3419Cylinder 3 deactivation/intake valve, control circuit: signal low
- P341BDeactivation/intake valve (bank 2), control circuit: performance
- P341CDeactivation/exhaust valve (bank 1), control circuit: performance
- P341DDeactivation/exhaust valve (bank 2), control circuit: performance
P34xx codes: cylinder deactivation and camshaft actuators
In the glossary
Read more: Remote OBD diagnostics: what it is, how it works and what it can't do