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P1861 – Transfer Case Shift Motor Feedback Circuit Fault

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Symptoms

  • 4WD not engaging
  • Incorrect mode

Causes

  • Wiring issue
  • Sensor failure
  • Motor fault

Diagnosis

  • Inspect wiring
  • Read feedback data
  • Test motor

Repair

  • Repair wiring
  • Replace sensor
  • Replace motor
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