P1800 – Intake Manifold Runner Control (Nissan)

Description

The ECM detected a malfunction in the intake manifold runner control system.

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Symptoms

  • Poor acceleration
  • Rough idle

Causes

  • Stuck runner
  • Vacuum leak
  • Wiring issue

Diagnosis

  • Check IMRC actuator
  • Inspect vacuum lines
  • Scan ECM data

Repair

  • Repair vacuum leak
  • Replace actuator