P2643 – A Rocker Arm Actuator Control Circuit Intermittent

Description

The ECM detects intermittent rocker arm actuator control circuit operation.

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Symptoms

  • Hesitation
  • Poor acceleration
  • Check engine light

Causes

  • Loose wiring
  • Failing actuator
  • ECM issue

Diagnosis

  • Inspect wiring
  • Test actuator
  • Check ECM

Repair

  • Repair wiring
  • Replace actuator