P1309 – Misfire Detection Monitor Fault (Nissan)

Description

The ECM detected a malfunction in the misfire detection monitoring system.

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Symptoms

  • Misfire
  • Poor drivability

Causes

  • ECM logic fault
  • Sensor issue
  • Wiring problem

Diagnosis

  • Scan misfire data
  • Inspect sensors
  • Check wiring

Repair

  • Repair wiring
  • Replace sensor
  • Repair ECM

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