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P1929 – Transmission Hydraulic Pressure High

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Symptoms

  • Harsh shifting
  • Overheating

Causes

  • Pressure regulator fault
  • Valve body issue
  • Wiring problem

Diagnosis

  • Read pressure data
  • Inspect wiring
  • Check regulator

Repair

  • Replace regulator
  • Repair wiring
  • Service valve body
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