P3443Cylinder 6 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
- Here the engine computer has found the cylinder 6 solenoid's switched lead pulled to ground. GM spells out the test for its 2019 V8s (L84, L86 and the LT4 Corvette): while the low-side driver is off, an impedance under 0.5 ohm toward ground is a fault, and 20 hits among 25 checks while the powertrain relay supplies at least 11 V store a Type B code. GM adds that some controllers record the open-circuit code P3441 at the same moment, so the pair does not prove two separate faults. On the L84 each solenoid also has a high-side feed, and a short to ground there carries GM's own code P3114. P3444 is the short to voltage on this channel. Cylinder deactivation stays off until the fault is repaired.
- What you may notice
- Check engine lamp on from the second faulty trip
- Four-cylinder mode no longer available
- P3441 stored at the same time on some GM controllers
- Likely causes
- LikelyInsulation of the cylinder 6 control wire worn through to ground
- PossibleCylinder 6 solenoid shorted internally to its housing
- RareMoisture or oil bridging the pins of the solenoid connector
- RareOutput stage in the engine control module damaged
- 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.