Powertrain, shared range

P3417 Cylinder 3 Deactivation/Intake Valve Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P3417 flags a broken path in the drive circuit of the cylinder 3 deactivation solenoid. GM documents it twice: its 2007 Displacement on Demand table covers solenoid circuits on cylinder 1, 3 and 5 and needs 30 bad readings in 100 with the engine turning faster than 800 rpm; for the 2019 DFM engine L84, the ECM expects over 200 kohm whenever its low-side output rests, 20 of 25 checks, Type B. That controller also watches a high-side driver for the same solenoid under separate codes, and GM warns that P3419 may appear alongside. The LTA and LT2 V8s also put cylinder 3 to rest, together with 2, 5 and 8 (bulletin 20-NA-038). As long as the circuit is open, every cylinder keeps firing.

Likely causes

Broken or chafed wire between control module and cylinder 3 solenoid
Open winding in the cylinder 3 deactivation solenoid
Loose, oily or corroded solenoid connector
Failed output stage in the engine control module

Symptoms

  • Check engine lamp on
  • Reduced-cylinder mode no longer engages
  • Slightly higher fuel consumption

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

P3418P3419P3420P3421P349AP3401P3433P3400

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