P0904 – Gear Shift Position Circuit

Description

The ECM detects a malfunction in the gear shift position circuit.

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Symptoms

  • Wrong gear display
  • Harsh shifting
  • No shift

Causes

  • Faulty sensor
  • Wiring issues
  • Misadjusted linkage

Diagnosis

  • Monitor position data
  • Inspect wiring
  • Check linkage

Repair

  • Replace sensor
  • Repair wiring
  • Adjust linkage

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