P1616 – NATS Chain Error (Nissan)

Description

The ECM detected a NATS chain error in the immobilizer system.

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Symptoms

  • No start
  • Security light

Causes

  • Key mismatch
  • IMMU fault
  • ECM error

Diagnosis

  • Check key ID
  • Scan NATS data
  • Inspect IMMU

Repair

  • Reprogram key
  • Replace IMMU