P1262 – Immobilizer Key Error (Nissan)

Description

The ECM detected an invalid or unreadable immobilizer key signal.

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Symptoms

  • No start
  • Security light
  • Key not recognized

Causes

  • Damaged key
  • Weak transponder
  • Antenna issue

Diagnosis

  • Test key transponder
  • Inspect antenna
  • Scan immobilizer data

Repair

  • Replace key
  • Replace antenna
  • Reprogram system

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