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P1630 – Immobilizer Code Not Programmed

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Symptoms

  • No start
  • Security light

Causes

  • New ECM
  • Unprogrammed key
  • Immobilizer mismatch

Diagnosis

  • Scan immobilizer
  • Check key programming
  • Inspect wiring

Repair

  • Program immobilizer
  • Program key
  • Repair wiring
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