Powertrain, shared range

P3441 Cylinder 6 Deactivation/Intake Valve Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Cylinder 6 belongs to both classic V8 deactivation groups, so P3441 is a code that real engines set. On GM V8s with Active Fuel Management, which park cylinders 1, 7, 6 and 4, the 2019 tables list it for the L86 truck engine and the LT4 Corvette: with the low-side driver off, more than 200 kohm between output and ground counts as an open, and 20 failures in 25 samples (every 250 ms, from 400 rpm) store a Type B code. The L84 with Dynamic Fuel Management runs the same check from 425 rpm. Chrysler names P3441 for the 5.7 L Hemi with MDS; a STAR case blames a heat shield rubbing through the solenoid harness. Shorts on this circuit are P3443 and P3444.

Likely causes

Solenoid harness broken or chafed through (on the 5.7 L Hemi by the manifold heat shield)
Open coil in the cylinder 6 deactivation solenoid
Loose or corroded connector at the cylinder 6 solenoid
Control module software that needs an update (Chrysler TSB 18-002-25)

Symptoms

  • Check engine lamp on
  • Engine no longer drops to four-cylinder mode
  • Possibly circuit codes for cylinders 1, 4 and 7 as well if the shared harness is damaged

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

P3442P3443P3444P3445P3449P3400P3497P0306

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