Powertrain, shared range

P3410 Cylinder 2 Deactivation/Intake Valve Control Performance

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P3410 covers a cylinder 2 deactivation system that is electrically intact but does not do what is commanded, such as valves that keep opening or fail to return. No manufacturer documents this code publicly. GM checks this behavior on the L84 under its own code P3499, by watching manifold pressure while cylinder 2 should be off; Ford uses the matching cylinder 1 code P3402. GM bulletin 21-NA-036 for 3.6 L V6 engines shows how such faults appear in practice: oil leaking past the control valve or rockers that do not latch cause misfires on cylinder 2 (P0302). Circuit faults belong to P3409, P3411 and P3412. Expect roughness and lost economy.

Likely causes

Oil bleeding past the control valve seal, pressure lost

Rocker or lifter of cylinder 2 not latching

Low or degraded oil

Broken solenoid tip left in the bore keeps a new valve from seating

Symptoms

Misfire on cylinder 2, often after a reduced-cylinder phase
Check engine lamp on
Vibration at light load

Repair estimate

DifficultyHardWorkshop job

Parts and labour€100–3,500

Time0–12 h

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

Parts involved

cylinder deactivation solenoidlifterengine oil

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