P0731High urgency

Gear 1 Incorrect Ratio

Transmission · Gear Control

⛔ Transmission slippage in 1st gear — a progressive mechanical failure. Service immediately before further damage occurs.
What this means

The transmission is in 1st gear but the input/output speed ratio does not match what is expected for 1st gear. Internal transmission slipping is occurring in 1st gear.

Likely causes
  • Worn 1st gear clutch packMost common
  • Failed 1st gear solenoidCommon
  • Degraded transmission fluidCommon
Estimated repair cost
Transmission fluid and filter service$100 – $250
Solenoid replacement$150 – $400
Transmission rebuild/replacement$1,500 – $5,000
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Frequently asked questions about P0731

What does P0731 mean?

The transmission is in 1st gear but the input/output speed ratio does not match what is expected for 1st gear. Internal transmission slipping is occurring in 1st gear.

Is P0731 serious?

Transmission slippage in 1st gear — a progressive mechanical failure. Service immediately before further damage occurs.

How much does it cost to fix P0731?

Repair costs for P0731 range from $100 – $250 depending on the root cause and your vehicle.

Can I drive with P0731?

No — this code indicates a serious issue. Stop driving and have the vehicle inspected immediately.

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