P3411Cylinder 2 Deactivation/Intake Valve Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3411 means the control output for the cylinder 2 deactivation valve sees a short to ground. GM lists it for the L84 V8 (2019), whose Dynamic Fuel Management can switch off any cylinder: below 0.5 ohm to ground with the low-side driver off, 20 failures in 25 samples every 250 ms, at least 11 V on the powertrain relay and 425 rpm. It is a Type B fault, so the lamp lights after two trips in a row. GM notes that some controllers set P3409 together with it. On engines where cylinder 2 cannot be deactivated the code has no use. The fix is usually in the wiring or the solenoid in the engine valley; P3412 is the short to power.
- What you may notice
- Check engine lamp after two trips
- Dynamic Fuel Management inactive, engine stays on all cylinders
- Likely causes
- LikelyDamaged insulation lets the control wire touch ground
- PossibleCylinder 2 solenoid shorted internally
- RareFaulty engine control module driver
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.