P3433Cylinder 5 Deactivation/Intake Valve Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3433 reports an open control circuit to the deactivation valve of cylinder 5, and GM has used it across three generations. The 2007 V6 with Displacement on Demand, which shut off cylinders 1, 3 and 5, already flagged a short or open after 30 failures in 100 samples at 250 ms above 800 rpm. On the 3.6 L V6 (LGX, LGZ) cylinder 5 is an active fuel management cylinder, and GM tied P3433 to oil leaking from the rocker arm control valve in the camshaft cover. The 2019 L84 V8 tests every cylinder with a 200 kohm limit. Each time it is a Type B code. P3434 to P3436 are the function and short codes for the same cylinder.
- What you may notice
- Check engine lamp on
- Oil seepage at the valve cover control valve (V6)
- Reduced-cylinder mode no longer used
- Likely causes
- LikelyOil leaking at the cylinder 5 control valve into its connector (GM 3.6 L V6)
- PossibleBroken wire or spread terminal in the solenoid circuit
- PossibleOpen coil in the cylinder 5 solenoid
- RareEngine control module output fault
- 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.