Powertrain, shared range

P3416 Cylinder 2 Exhaust Valve Control Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

P3416 means the control line of a separate cylinder 2 exhaust valve actuator sits too high, typically because it touches a supply voltage or the coil has shorted turns. No manufacturer documents this code publicly. The closest published test is GM's for the intake-side P3412 on the L84: once the output stage is active, any resistance to supply below 0.5 ohm is a failure, and 20 hits out of 25 lead to a Type B entry. NHTSA's review of GM's DFM V8 describes one valve lifter oil solenoid per cylinder that serves intake and exhaust alike, which is why such engines need no exhaust-only code. CARB requires shorts in outputs to be detected. Related: P3413 open, P3415 short to ground, P3408 for cylinder 1.

Likely causes

Actuator control wire shorted to a supply line

Shorted turns in the cylinder 2 exhaust actuator coil

Engine control module output stage fault

Symptoms

Check engine lamp on
Engine stays in full-cylinder mode

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

P3413 P3414 P3415 P3412 P3408

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