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Diagnose/P1731
P1731Critical SeverityTransmission

GM: Transmission control Code 31

What This Means

This GM manufacturer-specific code indicates an issue with the transmission control system. Code P1731 requires GM-specific diagnostic procedures and potentially dealer-level scan equipment.

Common Symptoms

  • Check engine light on
  • Shifting concern
  • Warning light on
  • Driveability change

Common Causes

  • GM-specific transmission control component
  • Solenoid or actuator failure
  • Wiring damage
  • Fluid condition issue
  • Module communication error

Estimated Repair Cost

$375 – $900
Parts and labor (varies by vehicle and location)
Difficulty:Professional

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.