P0853 – Drive Switch Input Circuit

Description

The ECM detects a malfunction in the drive switch input circuit.

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Symptoms

  • Harsh shifting
  • No shift
  • Limp mode

Causes

  • Faulty switch
  • Wiring issues
  • Poor grounds

Diagnosis

  • Monitor switch data
  • Inspect wiring
  • Check grounds

Repair

  • Replace switch
  • Repair wiring

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