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2006 MAZDA MPV
3.0L V6•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor486Torque3100Fluid7DTC1789Battery1Maintenance0Recalls2
P1602high severityPowertrain

Immobilizer Communication Error

on 2006 Mazda MPV 3.0L V6 · FWD

What this code means

The PCM cannot properly communicate with the immobilizer control module. This may prevent the engine from starting.

Symptoms

  • Engine will not start
  • Security light on
  • No communication with immobilizer

Common causes

  • Faulty immobilizer module
  • Damaged wiring between modules
  • Poor connection or ground
  • Faulty PCM

Diagnostic steps

  1. Scan for immobilizer codes
  2. Inspect wiring between PCM and immobilizer
  3. Check power and ground circuits
  4. Repair connections or replace module
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