P1260 – Theft Deterrent / Immobilizer Signal (Nissan)

Description

The ECM detected an abnormal signal from the theft deterrent or immobilizer system.

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Symptoms

  • No start
  • Security light flashing
  • Intermittent start

Causes

  • Faulty key
  • Antenna issue
  • ECM communication fault

Diagnosis

  • Test key transponder
  • Inspect antenna
  • Scan immobilizer data

Repair

  • Reprogram key
  • Replace antenna
  • Repair wiring