P1210 – Immobilizer / ECM Communication (Nissan)

Description

The ECM detected a communication fault with the immobilizer system.

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Symptoms

No start
Security light flashing
Intermittent start issues

Causes

Faulty NATS antenna
ECM communication fault
Key transponder issue
Wiring problems

Diagnosis

Check NATS antenna
Test key transponder
Inspect wiring
Scan immobilizer data

Repair

Replace antenna
Reprogram key
Repair wiring