P2648 – A Rocker Arm Actuator Control Circuit Range/Performance (Bank 1)

Description

The ECM detects incorrect rocker arm actuator control circuit range or performance on bank 1.

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Symptoms

  • Rough idle
  • Poor acceleration
  • Check engine light

Causes

  • Faulty actuator
  • Wiring issues
  • ECM fault

Diagnosis

  • Test actuator
  • Inspect wiring
  • Check ECM

Repair

  • Replace actuator
  • Repair wiring

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