P1288 – Intake Manifold Tuning Valve Range/Performance (Nissan)

Description

The ECM detected an intake manifold tuning valve signal outside the expected range.

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Symptoms

  • Poor acceleration
  • Hesitation

Causes

  • Faulty valve
  • Vacuum leak
  • Wiring issue

Diagnosis

  • Test valve operation
  • Inspect vacuum lines
  • Scan live data

Repair

  • Replace valve
  • Repair vacuum leak
  • Repair wiring