P2646 – A Rocker Arm Actuator Control Circuit Low (Bank 1)

Description

The ECM detects a low rocker arm actuator control circuit signal on bank 1.

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Symptoms

  • Poor acceleration
  • Hesitation
  • Check engine light

Causes

  • Weak actuator
  • Wiring short to ground
  • ECM issue

Diagnosis

  • Test actuator
  • Inspect wiring
  • Check ECM

Repair

  • Replace actuator
  • Repair wiring