P3444Cylinder 6 Deactivation/Intake Valve Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3444 is set when the output that switches the cylinder 6 deactivation solenoid to ground still sees supply voltage while it is turned on, meaning the line has a short to power instead of a path through the coil. GM tests this on the 2019 L84, L86 and LT4 V8s with a limit of 0.5 ohm to controller power, 20 errors out of 25 samples at 250 ms intervals and Type B lamp logic. On the L84, whose solenoids also have a switched high-side feed, a short to voltage on that feed has the separate GM code P3115. Because the ECM can no longer energize the valve, cylinder 6 simply keeps firing and the engine gives up four-cylinder operation. Compare P3441 (open) and P3443 (short to ground).
- What you may notice
- Check engine lamp on
- Engine runs on all eight cylinders permanently
- Slightly higher fuel consumption at light load
- Likely causes
- LikelyCylinder 6 control wire in contact with a supply wire in the harness
- PossibleShorted turns in the cylinder 6 solenoid coil
- RareFaulty output stage in the engine control module
- 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.