Powertrain, shared range

P3415 Cylinder 2 Exhaust Valve Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Control wire of the cylinder 2 exhaust actuator touching ground
Internal short in the cylinder 2 exhaust actuator
Damaged output stage in the engine control module

Symptoms

  • Check engine lamp on
  • Cylinder deactivation inhibited

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–900
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

cylinder deactivation solenoidwiring harnessecm

Related codes

P3413P3414P3416P3411P3407

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.