P1487 – EVAP Purge Flow Monitoring Fault (Nissan)

Description

The ECM detected a malfunction in EVAP purge flow monitoring.

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Symptoms

  • Rough idle
  • Hesitation

Causes

  • Sensor fault
  • Valve issue
  • Vacuum leak

Diagnosis

  • Check purge flow
  • Inspect hoses
  • Scan EVAP data

Repair

  • Replace valve
  • Repair hoses