Powertrain, shared range

P3414 Cylinder 2 Exhaust Valve Control Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P3414 would be set when the exhaust valves of cylinder 2 do not follow a deactivation or reactivation command on an engine with separate exhaust valve control. No manufacturer documents this code publicly. The underlying problem is described in a Ford patent: an exhaust valve that still opens after deactivation shows up as pressure changes in the exhaust, and the controller can reactivate the cylinder or block further deactivation. GM's DFM engines report a cylinder whose intake and exhaust valves stay active under their own code P3499 instead. Electrical faults on this channel are P3413, P3415 and P3416, the intake-side function code is P3410.

Likely causes

Exhaust-side lifter or rocker of cylinder 2 not switching
Low oil pressure or aerated oil
Exhaust actuator valve sticking

Symptoms

  • Check engine lamp on
  • Rough running when cylinders are switched off
  • Deactivation suspended by the engine computer

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

Related codes

P3413P3415P3416P3410P3499

References: law.cornell.edu, patents.google.com, gsi.ext.gm.com.