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P3447 Powertrain

Cylinder 6 Exhaust Valve Control Circuit High

The engine control module has detected a high-side voltage fault (short to power) on the cylinder 6 exhaust valve deactivation solenoid circuit. Cylinder deactivation is disabled while the fault is present.

Affected components

  • Cylinder deactivation solenoid
  • Engine wiring harness
  • Ecm

Common causes

  • High likelihood: Wiring shorted to power
  • Medium likelihood: Solenoid internal short
  • Low likelihood: Connector pins corroded - high contact resistance

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions
  • A drive cycle may be required after repair

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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