P1261 – Theft Deterrent / Start Inhibit (Nissan)

Description

The ECM detected a start inhibit condition from the theft deterrent system.

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Symptoms

  • No start
  • Security warning
  • Intermittent start

Causes

  • Key not recognized
  • Antenna fault
  • ECM signal error

Diagnosis

  • Test key
  • Inspect antenna
  • Scan immobilizer data

Repair

  • Reprogram key
  • Replace antenna
  • Repair wiring