P3415Cylinder 2 Exhaust Valve Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3415 describes a control circuit for a dedicated cylinder 2 exhaust valve actuator that is pulled toward ground. No manufacturer documents this code publicly. Cylinder 2 itself is a common deactivation candidate: GM switches it off on its 3.6 l and 3.0 l V6 engines (bulletin 21-NA-036) and on DFM V8s, but there one oil control valve serves the whole cylinder, so wiring faults land on the intake-side codes P3409, P3411 and P3412. On the L84, GM treats a resistance to ground below 0.5 ohm, read while the output stage is inactive, as a short. CARB wants these outputs tested for shorts. Siblings: P3413 open, P3414 function, P3416 short to power; cylinder 1 uses P3407. The engine keeps running on all cylinders.
- What you may notice
- Check engine lamp on
- Cylinder deactivation inhibited
- Likely causes
- PossibleControl wire of the cylinder 2 exhaust actuator touching ground
- PossibleInternal short in the cylinder 2 exhaust actuator
- RareDamaged 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.