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OBD-II Code

P0731 — Gear 1 Incorrect Ratio

The TCM detects an incorrect gear ratio while operating in first gear.

System Engine
Severity Critical
Safe to drive? Yes, with caution
Advanced scanner Yes

What does code P0731 mean?

The TCM detects an incorrect gear ratio while operating in first gear.

Common symptoms

  • Hard launch
  • harsh engagement
  • limp mode
  • poor acceleration

Possible causes

  • Internal slippage
  • faulty solenoids
  • low ATF level

Initial recommendation

Inspect transmission pressure, internal components and solenoid operation.

Safety notice

This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.

Analyze this code with MecaOBD

Use the app to combine code P0731 with your vehicle's actual symptoms for more complete diagnostic guidance.

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