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P1859 – Transfer Case Shift Motor Overtemperature

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Symptoms

  • 4WD not engaging
  • Burning smell

Causes

  • Motor overheating
  • Mechanical jam
  • Wiring issue

Diagnosis

  • Read temp data
  • Inspect wiring
  • Check motor

Repair

  • Replace motor
  • Repair wiring
  • Fix linkage
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