P3490

DTC P3490, sometimes indicated as P349000 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing cylinder 12 deactivation/intake valve control circuit performance.

The P3490 code means that the engine's computer has detected a problem with the cylinder 12 deactivation/intake valve control circuit. This can be caused by a variety of things, including a defective sensor, a wiring problem, or a problem with the valve itself.
To fix this problem, you'll need to identify and fix the underlying cause. This may require some diagnostic work, so it's best to take the car to a mechanic if you're not sure what's wrong.

• P3490: Cylinder 12 Deactivation/Intake Valve Control Circuit Performance
• P3490: Deactivation/intake valve control, cylinder 12 – circuit performance
• P3490 00: Deactivation/intake valve control, cylinder 12 - circuit performance