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P1519 – Throttle Actuator Control Stuck Open

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Symptoms

  • High idle
  • Hanging RPM
  • Poor fuel economy

Causes

  • Carbon buildup
  • Actuator failure
  • ECU issue

Diagnosis

  • Inspect throttle body
  • Check actuator movement
  • Scan ECU

Repair

  • Clean throttle body
  • Replace actuator
  • Update ECU
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