P1263 – Immobilizer Antenna Fault (Nissan)

Description

The ECM detected a malfunction in the immobilizer antenna circuit.

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Symptoms

  • No start
  • Security light
  • Intermittent start

Causes

  • Open circuit
  • Shorted wiring
  • Faulty antenna

Diagnosis

  • Check wiring continuity
  • Inspect antenna
  • Scan immobilizer data

Repair

  • Repair wiring
  • Replace antenna